56399945784 has 256 divisors, whose sum is σ = 176577408000. Its totient is φ = 14616391680.

The previous prime is 56399945737. The next prime is 56399945801. The reversal of 56399945784 is 48754999365.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34792494 + ... + 34794114.

It is an arithmetic number, because the mean of its divisors is an integer number (689755500).

Almost surely, 2^56399945784 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 56399945784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88288704000).

56399945784 is an abundant number, since it is smaller than the sum of its proper divisors (120177462216).

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

56399945784 is a wasteful number, since it uses less digits than its factorization.

56399945784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1914 counting only the distinct ones).

The product of its digits is 293932800, while the sum is 69.

The spelling of 56399945784 in words is "fifty-six billion, three hundred ninety-nine million, nine hundred forty-five thousand, seven hundred eighty-four".