56628332880 has 80 divisors (see below), whose sum is σ = 200626099584. Its totient is φ = 12943618560.

The previous prime is 56628332861. The next prime is 56628332881. The reversal of 56628332880 is 8823382665.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56628332881) 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 15 ways as a sum of consecutive naturals, for example, 16851991 + ... + 16855350.

Almost surely, 2^56628332880 is an apocalyptic number.

It is an amenable number.

56628332880 is an abundant number, since it is smaller than the sum of its proper divisors (143997766704).

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

56628332880 is a wasteful number, since it uses less digits than its factorization.

56628332880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33707364 (or 33707358 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 56628332880 in words is "fifty-six billion, six hundred twenty-eight million, three hundred thirty-two thousand, eight hundred eighty".