25855407984 has 80 divisors (see below), whose sum is σ = 80825326848. Its totient is φ = 6952713216.

The previous prime is 25855407947. The next prime is 25855408003. The reversal of 25855407984 is 48970455852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2257542 + ... + 2268965.

Almost surely, 2^25855407984 is an apocalyptic number.

25855407984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25855407984 is an abundant number, since it is smaller than the sum of its proper divisors (54969918864).

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

25855407984 is a wasteful number, since it uses less digits than its factorization.

25855407984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526542 (or 4526536 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 57.

The spelling of 25855407984 in words is "twenty-five billion, eight hundred fifty-five million, four hundred seven thousand, nine hundred eighty-four".