56557958977 has 8 divisors (see below), whose sum is σ = 64114285760. Its totient is φ = 49459591440.

The previous prime is 56557958957. The next prime is 56557958981. The reversal of 56557958977 is 77985975565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56557958977 - 2²⁷ = 56423741249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56557958957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114489549 + ... + 114490042.

It is an arithmetic number, because the mean of its divisors is an integer number (8014285720).

Almost surely, 2^56557958977 is an apocalyptic number.

It is an amenable number.

56557958977 is a deficient number, since it is larger than the sum of its proper divisors (7556326783).

56557958977 is a wasteful number, since it uses less digits than its factorization.

56557958977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228979623.

The product of its digits is 833490000, while the sum is 73.

The spelling of 56557958977 in words is "fifty-six billion, five hundred fifty-seven million, nine hundred fifty-eight thousand, nine hundred seventy-seven".