25397707972 has 48 divisors (see below), whose sum is σ = 56037002112. Its totient is φ = 9802379520.

The previous prime is 25397707919. The next prime is 25397708003. The reversal of 25397707972 is 27970779352.

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, 835978 + ... + 865825.

It is an arithmetic number, because the mean of its divisors is an integer number (1167437544).

Almost surely, 2^25397707972 is an apocalyptic number.

It is an amenable number.

25397707972 is an abundant number, since it is smaller than the sum of its proper divisors (30639294140).

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

25397707972 is a wasteful number, since it uses less digits than its factorization.

25397707972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701868 (or 1701866 counting only the distinct ones).

The product of its (nonzero) digits is 11668860, while the sum is 58.

The spelling of 25397707972 in words is "twenty-five billion, three hundred ninety-seven million, seven hundred seven thousand, nine hundred seventy-two".