56791605990 has 256 divisors, whose sum is σ = 166444056576. Its totient is φ = 12126412800.

The previous prime is 56791605979. The next prime is 56791606009. The reversal of 56791605990 is 9950619765.

It is a self number, because there is not a number n which added to its sum of digits gives 56791605990.

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 32998330 + ... + 33000050.

It is an arithmetic number, because the mean of its divisors is an integer number (650172096).

Almost surely, 2^56791605990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56791605990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83222028288).

56791605990 is an abundant number, since it is smaller than the sum of its proper divisors (109652450586).

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

56791605990 is a wasteful number, since it uses less digits than its factorization.

56791605990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 4592700, while the sum is 57.

The spelling of 56791605990 in words is "fifty-six billion, seven hundred ninety-one million, six hundred five thousand, nine hundred ninety".