15115332972 has 18 divisors (see below), whose sum is σ = 35270104044. Its totient is φ = 5038302360.

The previous prime is 15115332929. The next prime is 15115332977. The reversal of 15115332972 is 27923351151.

It is a self number, because there is not a number n which added to its sum of digits gives 15115332972.

It is not an unprimeable number, because it can be changed into a prime (15115332977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408147 + ... + 443637.

Almost surely, 2^15115332972 is an apocalyptic number.

15115332972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15115332972 is an abundant number, since it is smaller than the sum of its proper divisors (20154771072).

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

15115332972 is an frugal number, since it uses more digits than its factorization.

15115332972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70989 (or 35496 counting only the distinct ones).

The product of its digits is 56700, while the sum is 39.

The spelling of 15115332972 in words is "fifteen billion, one hundred fifteen million, three hundred thirty-two thousand, nine hundred seventy-two".