25565791408 has 40 divisors (see below), whose sum is σ = 50759719920. Its totient is φ = 12466728960.

The previous prime is 25565791337. The next prime is 25565791421. The reversal of 25565791408 is 80419756552.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2631616 + ... + 2641312.

It is an arithmetic number, because the mean of its divisors is an integer number (1268992998).

Almost surely, 2^25565791408 is an apocalyptic number.

It is an amenable number.

25565791408 is a deficient number, since it is larger than the sum of its proper divisors (25193928512).

25565791408 is a wasteful number, since it uses less digits than its factorization.

25565791408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13765 (or 13759 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 25565791408 in words is "twenty-five billion, five hundred sixty-five million, seven hundred ninety-one thousand, four hundred eight".