25231687320 has 64 divisors (see below), whose sum is σ = 86508645120. Its totient is φ = 5767242624.

The previous prime is 25231687319. The next prime is 25231687331. The reversal of 25231687320 is 2378613252.

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, 15018022 + ... + 15019701.

It is an arithmetic number, because the mean of its divisors is an integer number (1351697580).

Almost surely, 2^25231687320 is an apocalyptic number.

25231687320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25231687320 is an abundant number, since it is smaller than the sum of its proper divisors (61276957800).

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

25231687320 is a wasteful number, since it uses less digits than its factorization.

25231687320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30037744 (or 30037740 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 25231687320 in words is "twenty-five billion, two hundred thirty-one million, six hundred eighty-seven thousand, three hundred twenty".