15920717912 has 64 divisors (see below), whose sum is σ = 33290611200. Its totient is φ = 7076384640.

The previous prime is 15920717903. The next prime is 15920717951. The reversal of 15920717912 is 21971702951.

15920717912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

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 15 ways as a sum of consecutive naturals, for example, 1426289 + ... + 1437407.

It is an arithmetic number, because the mean of its divisors is an integer number (520165800).

Almost surely, 2^15920717912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15920717912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16645305600).

15920717912 is an abundant number, since it is smaller than the sum of its proper divisors (17369893288).

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

15920717912 is a wasteful number, since it uses less digits than its factorization.

15920717912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11496 (or 11492 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 44.

The spelling of 15920717912 in words is "fifteen billion, nine hundred twenty million, seven hundred seventeen thousand, nine hundred twelve".