15791956128 has 96 divisors (see below), whose sum is σ = 49602974400. Its totient is φ = 4859059968.

The previous prime is 15791956111. The next prime is 15791956133. The reversal of 15791956128 is 82165919751.

It is a happy number.

15791956128 is a `hidden beast` number, since 1 + 5 + 7 + 9 + 19 + 5 + 612 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691758 + ... + 714221.

It is an arithmetic number, because the mean of its divisors is an integer number (516697650).

Almost surely, 2^15791956128 is an apocalyptic number.

15791956128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15791956128 is an abundant number, since it is smaller than the sum of its proper divisors (33811018272).

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

15791956128 is a wasteful number, since it uses less digits than its factorization.

15791956128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406011 (or 1405997 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 54.

The spelling of 15791956128 in words is "fifteen billion, seven hundred ninety-one million, nine hundred fifty-six thousand, one hundred twenty-eight".