25689260136 has 32 divisors (see below), whose sum is σ = 65958913440. Its totient is φ = 8331651648.

The previous prime is 25689260123. The next prime is 25689260171. The reversal of 25689260136 is 63106298652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14463786 + ... + 14465561.

It is an arithmetic number, because the mean of its divisors is an integer number (2061216045).

Almost surely, 2^25689260136 is an apocalyptic number.

It is an amenable number.

25689260136 is an abundant number, since it is smaller than the sum of its proper divisors (40269653304).

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

25689260136 is a wasteful number, since it uses less digits than its factorization.

25689260136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28929393 (or 28929389 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 25689260136 in words is "twenty-five billion, six hundred eighty-nine million, two hundred sixty thousand, one hundred thirty-six".