56999999994 has 128 divisors (see below), whose sum is σ = 136036454400. Its totient is φ = 15909671232.

The previous prime is 56999999951. The next prime is 57000000011. The reversal of 56999999994 is 49999999965.

It is a self number, because there is not a number n which added to its sum of digits gives 56999999994.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28685469 + ... + 28687455.

It is an arithmetic number, because the mean of its divisors is an integer number (1062784800).

Almost surely, 2^56999999994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56999999994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68018227200).

56999999994 is an abundant number, since it is smaller than the sum of its proper divisors (79036454406).

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

56999999994 is a wasteful number, since it uses less digits than its factorization.

56999999994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329 (or 2315 counting only the distinct ones).

The product of its digits is 5165606520, while the sum is 87.

The spelling of 56999999994 in words is "fifty-six billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-four".