25805866604 has 24 divisors (see below), whose sum is σ = 51615920160. Its totient is φ = 11058759936.

The previous prime is 25805866553. The next prime is 25805866627. The reversal of 25805866604 is 40666850852.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406334 + ... + 465530.

It is an arithmetic number, because the mean of its divisors is an integer number (2150663340).

Almost surely, 2^25805866604 is an apocalyptic number.

It is an amenable number.

25805866604 is an abundant number, since it is smaller than the sum of its proper divisors (25810053556).

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

25805866604 is a wasteful number, since it uses less digits than its factorization.

25805866604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74777 (or 74775 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 25805866604 in words is "twenty-five billion, eight hundred five million, eight hundred sixty-six thousand, six hundred four".