25525664 has 24 divisors (see below), whose sum is σ = 52899840. Its totient is φ = 12090816.

The previous prime is 25525663. The next prime is 25525673. The reversal of 25525664 is 46652552.

It is not an unprimeable number, because it can be changed into a prime (25525663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20384 + ... + 21599.

It is an arithmetic number, because the mean of its divisors is an integer number (2204160).

Almost surely, 2^25525664 is an apocalyptic number.

It is an amenable number.

25525664 is an abundant number, since it is smaller than the sum of its proper divisors (27374176).

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

25525664 is a wasteful number, since it uses less digits than its factorization.

25525664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42012 (or 42004 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 25525664 is about 5052.2929447925. The cubic root of 25525664 is about 294.4369764914.

The spelling of 25525664 in words is "twenty-five million, five hundred twenty-five thousand, six hundred sixty-four".