25513664 has 28 divisors (see below), whose sum is σ = 55232808. Its totient is φ = 11596800.

The previous prime is 25513633. The next prime is 25513687. The reversal of 25513664 is 46631552.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25513664.

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, 17417 + ... + 18824.

Almost surely, 2^25513664 is an apocalyptic number.

It is an amenable number.

25513664 is an abundant number, since it is smaller than the sum of its proper divisors (29719144).

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

25513664 is a wasteful number, since it uses less digits than its factorization.

25513664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36264 (or 36254 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 25513664 is about 5051.1052255917. The cubic root of 25513664 is about 294.3908295033.

The spelling of 25513664 in words is "twenty-five million, five hundred thirteen thousand, six hundred sixty-four".