56978402216 has 16 divisors (see below), whose sum is σ = 107551516500. Its totient is φ = 28297997824.

The previous prime is 56978402209. The next prime is 56978402227. The reversal of 56978402216 is 61220487965.

It can be written as a sum of positive squares in 2 ways, for example, as 56877480100 + 100922116 = 238490^2 + 10046^2 .

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 3 ways as a sum of consecutive naturals, for example, 23899145 + ... + 23901528.

Almost surely, 2^56978402216 is an apocalyptic number.

It is an amenable number.

56978402216 is a deficient number, since it is larger than the sum of its proper divisors (50573114284).

56978402216 is a wasteful number, since it uses less digits than its factorization.

56978402216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47800828 (or 47800824 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 56978402216 in words is "fifty-six billion, nine hundred seventy-eight million, four hundred two thousand, two hundred sixteen".