15791855782920 has 96 divisors (see below), whose sum is σ = 55110353875200. Its totient is φ = 3609567034752.

The previous prime is 15791855782883. The next prime is 15791855782939. The reversal of 15791855782920 is 2928755819751.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1342839000 + ... + 1342850759.

It is an arithmetic number, because the mean of its divisors is an integer number (574066186200).

Almost surely, 2^{15791855782920} is an apocalyptic number.

15791855782920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15791855782920 is an abundant number, since it is smaller than the sum of its proper divisors (39318498092280).

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

15791855782920 is a wasteful number, since it uses less digits than its factorization.

15791855782920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685689787 (or 2685689776 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 69.

The spelling of 15791855782920 in words is "fifteen trillion, seven hundred ninety-one billion, eight hundred fifty-five million, seven hundred eighty-two thousand, nine hundred twenty".