25621245164 has 12 divisors (see below), whose sum is σ = 44860630584. Its totient is φ = 12803922144.

The previous prime is 25621245157. The next prime is 25621245197. The reversal of 25621245164 is 46154212652.

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, 1666502 + ... + 1681805.

It is an arithmetic number, because the mean of its divisors is an integer number (3738385882).

Almost surely, 2^25621245164 is an apocalyptic number.

It is an amenable number.

25621245164 is a deficient number, since it is larger than the sum of its proper divisors (19239385420).

25621245164 is a wasteful number, since it uses less digits than its factorization.

25621245164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350224 (or 3350222 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

The spelling of 25621245164 in words is "twenty-five billion, six hundred twenty-one million, two hundred forty-five thousand, one hundred sixty-four".