25597534872 has 64 divisors (see below), whose sum is σ = 78761652480. Its totient is φ = 6750997632.

The previous prime is 25597534849. The next prime is 25597534883. The reversal of 25597534872 is 27843579552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5858058 + ... + 5862425.

It is an arithmetic number, because the mean of its divisors is an integer number (1230650820).

Almost surely, 2^25597534872 is an apocalyptic number.

It is an amenable number.

25597534872 is an abundant number, since it is smaller than the sum of its proper divisors (53164117608).

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

25597534872 is a wasteful number, since it uses less digits than its factorization.

25597534872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11720512 (or 11720508 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 57.

The spelling of 25597534872 in words is "twenty-five billion, five hundred ninety-seven million, five hundred thirty-four thousand, eight hundred seventy-two".