56670021568 has 28 divisors (see below), whose sum is σ = 115197373872. Its totient is φ = 27643911680.

The previous prime is 56670021503. The next prime is 56670021581. The reversal of 56670021568 is 86512007665.

It is a super-2 number, since 2×56670021568² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10795780 + ... + 10801027.

It is an arithmetic number, because the mean of its divisors is an integer number (4114191924).

Almost surely, 2^56670021568 is an apocalyptic number.

It is an amenable number.

56670021568 is an abundant number, since it is smaller than the sum of its proper divisors (58527352304).

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

56670021568 is a wasteful number, since it uses less digits than its factorization.

56670021568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21596860 (or 21596850 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 56670021568 in words is "fifty-six billion, six hundred seventy million, twenty-one thousand, five hundred sixty-eight".