# 2 to the 81st Power

Welcome to 2 to the 81st power, our post about the mathematical operation exponentiation of 2 to the power of 81.

If you have been looking for 2 to the eighty-first power, or if you have been wondering about 2 exponent 81, then you also have come to the right place.

The number 2 is called the base, and the number 81 is called the exponent. In this post we are going to answer the question what is 2 to the 81st power.

## What is 2 to the 81st Power?

2 to the 81st power is conventionally written as 281, with superscript for the exponent, but the notation using the caret symbol ^ can also be seen frequently: 2^81.

281 stands for the mathematical operation exponentiation of two by the power of eighty-one.

As the exponent is a positive integer, exponentiation means a repeated multiplication:

2 to the 81st power = \underbrace{ {\rm 2 \times\thinspace ... \times\thinspace 2} }_{\rm 81 \thickspace times} The exponent of the number 2, 81, also called index or power, denotes how many times to multiply the base (2).

Thus, we can answer what is 2 to the 81st power as

2 to the power of 81 = 281 = 24178 5163922925 8349412352.

If you have come here in search of an exponentiation different to 2 to the eighty-first power, or if you like to experiment with bases and indices, then use our calculator below.

To stick with 2 to the power of 81 as an example, insert 2 for the base and enter 81 as the index, also known as exponent or power.

Next, hit the convert button, then check the result.

2 to the 81st power is an exponentiation which belongs to the category powers of 2.

Similar exponentiations on our site in this category include, but are not limited, to:

Ahead is more info related to 2 to the 81 power, along with instructions how to use the search form, located in the sidebar or at the bottom, to obtain a number like 2^81.

## 2 to the Power of 81

Reading all of the above, you already know most about 2 to the power of 81, except for its inverse which is discussed a bit further below in this section.

Using the aforementioned search form you can look up many numbers, including, for instance, 2 to the power 81, and you will be taken to a result page with relevant posts.

Now, we would like to show you what the inverse operation of 2 to the 81st power, (281)−1, is. The inverse is the 81st root of 281, and the math goes as follows:

(281)−1
= \sqrt{2^{81}}
= 2^{81/81}
= 2^{1}
= 2

Because the index of 81 is not a multiple of 2, which means odd, in contrast to even numbers, the operation produces only one value: (281)−1 = 2.

Make sure to understand that exponentiation is not commutative, which means that 281 ≠ 812, and also note that (281)-1 ≠ 2-81, the inverse and reciprocal of 281, respectively.

You already know what 2 to the power of 81 equals, but you may also be interested in learning what 2 to the negative 81st power stands for.

Next is the summary of our content.

## Two to the Eighty-first Power

You have reached the concluding section of two to the eighty-first power = 281. Two to the eighty-first power is, for example, the same as 2 to the power 81 or 2 to the 81 power.

Exponentiations like 281 make it easier to write multiplications and to conduct math operations as numbers get either big or small, such as in case of decimal fractions with lots of trailing zeroes.

If you have been looking for 2 power 81, what is 2 to the 81 power, 2 exponent 81 or 81 power of 2, then it’s safe to assume that you have found your answer as well.

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Posted in Powers of 2