15920616864 has 48 divisors (see below), whose sum is σ = 41800449600. Its totient is φ = 5305751040.

The previous prime is 15920616847. The next prime is 15920616913. The reversal of 15920616864 is 46861602951.

15920616864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 526837 + ... + 556235.

It is an arithmetic number, because the mean of its divisors is an integer number (870842700).

Almost surely, 2^15920616864 is an apocalyptic number.

It is an amenable number.

15920616864 is an abundant number, since it is smaller than the sum of its proper divisors (25879832736).

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

15920616864 is a wasteful number, since it uses less digits than its factorization.

15920616864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35053 (or 35045 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 15920616864 in words is "fifteen billion, nine hundred twenty million, six hundred sixteen thousand, eight hundred sixty-four".