56635664556 has 48 divisors (see below), whose sum is σ = 132411452544. Its totient is φ = 18841232256.

The previous prime is 56635664539. The next prime is 56635664557. The reversal of 56635664556 is 65546653665.

It is a junction number, because it is equal to n+sod(n) for n = 56635664496 and 56635664505.

It is not an unprimeable number, because it can be changed into a prime (56635664557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19919671 + ... + 19922513.

It is an arithmetic number, because the mean of its divisors is an integer number (2758571928).

Almost surely, 2^56635664556 is an apocalyptic number.

It is an amenable number.

56635664556 is an abundant number, since it is smaller than the sum of its proper divisors (75775787988).

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

56635664556 is a wasteful number, since it uses less digits than its factorization.

56635664556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550 (or 5548 counting only the distinct ones).

The product of its digits is 58320000, while the sum is 57.

The spelling of 56635664556 in words is "fifty-six billion, six hundred thirty-five million, six hundred sixty-four thousand, five hundred fifty-six".