25905808872 has 48 divisors (see below), whose sum is σ = 70194573540. Its totient is φ = 8631207168.

The previous prime is 25905808829. The next prime is 25905808879. The reversal of 25905808872 is 27880850952.

25905808872 is a `hidden beast` number, since 2 + 59 + 0 + 580 + 8 + 8 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25454926116 + 450882756 = 159546^2 + 21234^2 .

It is a super-2 number, since 2×25905808872² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25905808879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71458 + ... + 238574.

Almost surely, 2^25905808872 is an apocalyptic number.

It is an amenable number.

25905808872 is an abundant number, since it is smaller than the sum of its proper divisors (44288764668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25905808872 is a wasteful number, since it uses less digits than its factorization.

25905808872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169282 (or 169275 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 25905808872 in words is "twenty-five billion, nine hundred five million, eight hundred eight thousand, eight hundred seventy-two".