15991416988 has 12 divisors (see below), whose sum is σ = 28949979240. Its totient is φ = 7719994352.

The previous prime is 15991416943. The next prime is 15991417009. The reversal of 15991416988 is 88961419951.

15991416988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68928406 + ... + 68928637.

It is an arithmetic number, because the mean of its divisors is an integer number (2412498270).

Almost surely, 2^15991416988 is an apocalyptic number.

It is an amenable number.

15991416988 is a deficient number, since it is larger than the sum of its proper divisors (12958562252).

15991416988 is a wasteful number, since it uses less digits than its factorization.

15991416988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137857076 (or 137857074 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 61.

The spelling of 15991416988 in words is "fifteen billion, nine hundred ninety-one million, four hundred sixteen thousand, nine hundred eighty-eight".