56915066880 has 544 divisors, whose sum is σ = 231523814400. Its totient is φ = 12995002368.

The previous prime is 56915066867. The next prime is 56915066881. The reversal of 56915066880 is 8866051965.

It is a happy number.

56915066880 is a `hidden beast` number, since 56 + 9 + 1 + 506 + 6 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56915066881) 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, 61931061 + ... + 61931979.

Almost surely, 2^56915066880 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 56915066880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115761907200).

56915066880 is an abundant number, since it is smaller than the sum of its proper divisors (174608747520).

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

56915066880 is an frugal number, since it uses more digits than its factorization.

56915066880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 56915066880 in words is "fifty-six billion, nine hundred fifteen million, sixty-six thousand, eight hundred eighty".