56564837857 has 8 divisors (see below), whose sum is σ = 61720356960. Its totient is φ = 51411528960.

The previous prime is 56564837807. The next prime is 56564837873. The reversal of 56564837857 is 75873846565.

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

It is a de Polignac number, because none of the positive numbers 2^k-56564837857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56564837807) 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, 498807 + ... + 601612.

It is an arithmetic number, because the mean of its divisors is an integer number (7715044620).

Almost surely, 2^56564837857 is an apocalyptic number.

It is an amenable number.

56564837857 is a deficient number, since it is larger than the sum of its proper divisors (5155519103).

56564837857 is a wasteful number, since it uses less digits than its factorization.

56564837857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105103.

The product of its digits is 169344000, while the sum is 64.

The spelling of 56564837857 in words is "fifty-six billion, five hundred sixty-four million, eight hundred thirty-seven thousand, eight hundred fifty-seven".