56644228956 has 48 divisors (see below), whose sum is σ = 159936650496. Its totient is φ = 15232061184.

The previous prime is 56644228891. The next prime is 56644228957. The reversal of 56644228956 is 65982244665.

56644228956 is a modest number, since divided by 228956 gives 56644 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 56644228896 and 56644228905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56644228957) 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, 19831986 + ... + 19834841.

It is an arithmetic number, because the mean of its divisors is an integer number (3332013552).

Almost surely, 2^56644228956 is an apocalyptic number.

It is an amenable number.

56644228956 is an abundant number, since it is smaller than the sum of its proper divisors (103292421540).

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

56644228956 is a wasteful number, since it uses less digits than its factorization.

56644228956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39666858 (or 39666856 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 57.

The spelling of 56644228956 in words is "fifty-six billion, six hundred forty-four million, two hundred twenty-eight thousand, nine hundred fifty-six".