56697524977818 has 16 divisors (see below), whose sum is σ = 113490100305216. Its totient is φ = 18883333267680.

The previous prime is 56697524977763. The next prime is 56697524977831. The reversal of 56697524977818 is 81877942579665.

It is a super-2 number, since 2×56697524977818² (a number of 28 digits) contains 22 as substring.

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, 3960423478 + ... + 3960437793.

It is an arithmetic number, because the mean of its divisors is an integer number (7093131269076).

Almost surely, 2^{56697524977818} is an apocalyptic number.

56697524977818 is an abundant number, since it is smaller than the sum of its proper divisors (56792575327398).

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

56697524977818 is a wasteful number, since it uses less digits than its factorization.

56697524977818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7920862469.

The product of its digits is 12802406400, while the sum is 84.

The spelling of 56697524977818 in words is "fifty-six trillion, six hundred ninety-seven billion, five hundred twenty-four million, nine hundred seventy-seven thousand, eight hundred eighteen".