15315980868 has 72 divisors (see below), whose sum is σ = 38897640600. Its totient is φ = 5081356800.

The previous prime is 15315980839. The next prime is 15315980893. The reversal of 15315980868 is 86808951351.

15315980868 is a `hidden beast` number, since 15 + 31 + 598 + 0 + 8 + 6 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 279825984 + 15036154884 = 16728^2 + 122622^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11771818 + ... + 11773118.

Almost surely, 2^15315980868 is an apocalyptic number.

15315980868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15315980868 is an abundant number, since it is smaller than the sum of its proper divisors (23581659732).

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

15315980868 is a wasteful number, since it uses less digits than its factorization.

15315980868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597 (or 2592 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 15315980868 in words is "fifteen billion, three hundred fifteen million, nine hundred eighty thousand, eight hundred sixty-eight".