25687604496 has 40 divisors (see below), whose sum is σ = 69852260320. Its totient is φ = 8111874816.

The previous prime is 25687604491. The next prime is 25687604521. The reversal of 25687604496 is 69440678652.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (25687604491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14082205 + ... + 14084028.

It is an arithmetic number, because the mean of its divisors is an integer number (1746306508).

Almost surely, 2^25687604496 is an apocalyptic number.

It is an amenable number.

25687604496 is an abundant number, since it is smaller than the sum of its proper divisors (44164655824).

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

25687604496 is a wasteful number, since it uses less digits than its factorization.

25687604496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28166263 (or 28166257 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 25687604496 in words is "twenty-five billion, six hundred eighty-seven million, six hundred four thousand, four hundred ninety-six".