56557657057 has 8 divisors (see below), whose sum is σ = 61701360480. Its totient is φ = 51414303360.

The previous prime is 56557657003. The next prime is 56557657147. The reversal of 56557657057 is 75075675565.

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 56557657057 - 2⁷ = 56557656929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56557656992 and 56557657010.

It is not an unprimeable number, because it can be changed into a prime (56557657157) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 342778 + ... + 480220.

It is an arithmetic number, because the mean of its divisors is an integer number (7712670060).

Almost surely, 2^56557657057 is an apocalyptic number.

It is an amenable number.

56557657057 is a deficient number, since it is larger than the sum of its proper divisors (5143703423).

56557657057 is a wasteful number, since it uses less digits than its factorization.

56557657057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174863.

The product of its (nonzero) digits is 38587500, while the sum is 58.

The spelling of 56557657057 in words is "fifty-six billion, five hundred fifty-seven million, six hundred fifty-seven thousand, fifty-seven".