25522938081 has 63 divisors (see below), whose sum is σ = 39309724233. Its totient is φ = 16563813120.

The previous prime is 25522938061. The next prime is 25522938109. The reversal of 25522938081 is 18083922552.

The square root of 25522938081 is 159759.

It is a perfect power (a square), and thus also a powerful number.

25522938081 is a `hidden beast` number, since 2 + 552 + 2 + 93 + 8 + 0 + 8 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9474102225 + 16048835856 = 97335^2 + 126684^2 .

It is not a de Polignac number, because 25522938081 - 2⁹ = 25522937569 is a prime.

It is a super-2 number, since 2×25522938081² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25522938031) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 263123025 + ... + 263123121.

Almost surely, 2^25522938081 is an apocalyptic number.

25522938081 is the 159759-th square number.

25522938081 is the 79880-th centered octagonal number.

It is an amenable number.

25522938081 is a deficient number, since it is larger than the sum of its proper divisors (13786786152).

25522938081 is an frugal number, since it uses more digits than its factorization.

25522938081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 25522938081 in words is "twenty-five billion, five hundred twenty-two million, nine hundred thirty-eight thousand, eighty-one".