15116731720864 has 60 divisors (see below), whose sum is σ = 31621115493954. Its totient is φ = 7113754846208.

The previous prime is 15116731720841. The next prime is 15116731720889. The reversal of 15116731720864 is 46802713761151.

It can be written as a sum of positive squares in 5 ways, for example, as 13830276712464 + 1286455008400 = 3718908^2 + 1134220^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 155347 + ... + 5500690.

Almost surely, 2^{15116731720864} is an apocalyptic number.

It is an amenable number.

15116731720864 is an abundant number, since it is smaller than the sum of its proper divisors (16504383773090).

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

15116731720864 is an frugal number, since it uses more digits than its factorization.

15116731720864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656115 (or 5656056 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 15116731720864 in words is "fifteen trillion, one hundred sixteen billion, seven hundred thirty-one million, seven hundred twenty thousand, eight hundred sixty-four".