15977022656 has 56 divisors (see below), whose sum is σ = 36519038976. Its totient is φ = 6793355520.

The previous prime is 15977022617. The next prime is 15977022673. The reversal of 15977022656 is 65622077951.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

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 7 ways as a sum of consecutive naturals, for example, 83510 + ... + 197301.

It is an arithmetic number, because the mean of its divisors is an integer number (652125696).

Almost surely, 2^15977022656 is an apocalyptic number.

15977022656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15977022656 is an abundant number, since it is smaller than the sum of its proper divisors (20542016320).

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

15977022656 is a wasteful number, since it uses less digits than its factorization.

15977022656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280957 (or 280947 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 15977022656 in words is "fifteen billion, nine hundred seventy-seven million, twenty-two thousand, six hundred fifty-six".