56891913984 has 108 divisors (see below), whose sum is σ = 164893502592. Its totient is φ = 18864537600.

The previous prime is 56891913983. The next prime is 56891914033. The reversal of 56891913984 is 48931919865.

56891913984 is a `hidden beast` number, since 56 + 8 + 9 + 191 + 398 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56891913983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375424 + ... + 504704.

Almost surely, 2^56891913984 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 56891913984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82446751296).

56891913984 is an abundant number, since it is smaller than the sum of its proper divisors (108001588608).

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

56891913984 is a wasteful number, since it uses less digits than its factorization.

56891913984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129494 (or 129477 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The spelling of 56891913984 in words is "fifty-six billion, eight hundred ninety-one million, nine hundred thirteen thousand, nine hundred eighty-four".