56566647984 has 160 divisors (see below), whose sum is σ = 182559744000. Its totient is φ = 14662713600.

The previous prime is 56566647967. The next prime is 56566647989. The reversal of 56566647984 is 48974666565.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (56566647989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1828969 + ... + 1859639.

It is an arithmetic number, because the mean of its divisors is an integer number (1140998400).

Almost surely, 2^56566647984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56566647984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91279872000).

56566647984 is an abundant number, since it is smaller than the sum of its proper divisors (125993096016).

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

56566647984 is a wasteful number, since it uses less digits than its factorization.

56566647984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31199 (or 31193 counting only the distinct ones).

The product of its digits is 261273600, while the sum is 66.

The spelling of 56566647984 in words is "fifty-six billion, five hundred sixty-six million, six hundred forty-seven thousand, nine hundred eighty-four".