25631772488 has 32 divisors (see below), whose sum is σ = 55586986560. Its totient is φ = 10852693440.

The previous prime is 25631772479. The next prime is 25631772527. The reversal of 25631772488 is 88427713652.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its 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, 2752643 + ... + 2761938.

It is an arithmetic number, because the mean of its divisors is an integer number (1737093330).

Almost surely, 2^25631772488 is an apocalyptic number.

25631772488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25631772488 is an abundant number, since it is smaller than the sum of its proper divisors (29955214072).

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

25631772488 is a wasteful number, since it uses less digits than its factorization.

25631772488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514677 (or 5514673 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 53.

The spelling of 25631772488 in words is "twenty-five billion, six hundred thirty-one million, seven hundred seventy-two thousand, four hundred eighty-eight".