25379840172 has 96 divisors (see below), whose sum is σ = 61217601984. Its totient is φ = 8178688000.

The previous prime is 25379840149. The next prime is 25379840201. The reversal of 25379840172 is 27104897352.

It is a happy number.

It is a Smith number, since the sum of its digits (48) 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 31 ways as a sum of consecutive naturals, for example, 38866198 + ... + 38866850.

It is an arithmetic number, because the mean of its divisors is an integer number (637683354).

Almost surely, 2^25379840172 is an apocalyptic number.

It is an amenable number.

25379840172 is an abundant number, since it is smaller than the sum of its proper divisors (35837761812).

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

25379840172 is a wasteful number, since it uses less digits than its factorization.

25379840172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 25379840172 in words is "twenty-five billion, three hundred seventy-nine million, eight hundred forty thousand, one hundred seventy-two".