25656715875 has 64 divisors (see below), whose sum is σ = 48847997952. Its totient is φ = 11715264000.

The previous prime is 25656715867. The next prime is 25656715891. The reversal of 25656715875 is 57851765652.

It is not a de Polignac number, because 25656715875 - 2³ = 25656715867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2480715 + ... + 2491035.

It is an arithmetic number, because the mean of its divisors is an integer number (763249968).

Almost surely, 2^25656715875 is an apocalyptic number.

25656715875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25656715875 is a deficient number, since it is larger than the sum of its proper divisors (23191282077).

25656715875 is a wasteful number, since it uses less digits than its factorization.

25656715875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11293 (or 11283 counting only the distinct ones).

The product of its digits is 17640000, while the sum is 57.

The spelling of 25656715875 in words is "twenty-five billion, six hundred fifty-six million, seven hundred fifteen thousand, eight hundred seventy-five".