15116731728 has 80 divisors (see below), whose sum is σ = 45386856960. Its totient is φ = 4245856128.

The previous prime is 15116731727. The next prime is 15116731739. The reversal of 15116731728 is 82713761151.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 15116731728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15116731723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361450 + ... + 401097.

It is an arithmetic number, because the mean of its divisors is an integer number (567335712).

Almost surely, 2^15116731728 is an apocalyptic number.

It is an amenable number.

15116731728 is an abundant number, since it is smaller than the sum of its proper divisors (30270125232).

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

15116731728 is a wasteful number, since it uses less digits than its factorization.

15116731728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762624 (or 762618 counting only the distinct ones).

The product of its digits is 70560, while the sum is 42.

The spelling of 15116731728 in words is "fifteen billion, one hundred sixteen million, seven hundred thirty-one thousand, seven hundred twenty-eight".