15966805056 has 56 divisors (see below), whose sum is σ = 42720219360. Its totient is φ = 5262461952.

The previous prime is 15966805033. The next prime is 15966805087. The reversal of 15966805056 is 65050866951.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450106 + ... + 484281.

It is an arithmetic number, because the mean of its divisors is an integer number (762861060).

Almost surely, 2^15966805056 is an apocalyptic number.

15966805056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15966805056 is an abundant number, since it is smaller than the sum of its proper divisors (26753414304).

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

15966805056 is an equidigital number, since it uses as much as digits as its factorization.

15966805056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934491 (or 934481 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 51.

The spelling of 15966805056 in words is "fifteen billion, nine hundred sixty-six million, eight hundred five thousand, fifty-six".