25656512 has 28 divisors (see below), whose sum is σ = 58186320. Its totient is φ = 10995456.

The previous prime is 25656487. The next prime is 25656541. The reversal of 25656512 is 21565652.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×25656512² = 1316513216012288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28187 + ... + 29082.

Almost surely, 2^25656512 is an apocalyptic number.

It is an amenable number.

25656512 is an abundant number, since it is smaller than the sum of its proper divisors (32529808).

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

25656512 is an equidigital number, since it uses as much as digits as its factorization.

25656512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57288 (or 57278 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 25656512 is about 5065.2257600229. The cubic root of 25656512 is about 294.9392271632.

The spelling of 25656512 in words is "twenty-five million, six hundred fifty-six thousand, five hundred twelve".