56399895917568 has 660 divisors, whose sum is σ = 196025555177760. Its totient is φ = 16105448153088.

The previous prime is 56399895917551. The next prime is 56399895917621. The reversal of 56399895917568 is 86571959899365.

56399895917568 is a `hidden beast` number, since 5 + 6 + 3 + 9 + 9 + 8 + 9 + 591 + 7 + 5 + 6 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 12513841971 + ... + 12513846477.

It is an arithmetic number, because the mean of its divisors is an integer number (297008416936).

Almost surely, 2^{56399895917568} 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 56399895917568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98012777588880).

56399895917568 is an abundant number, since it is smaller than the sum of its proper divisors (139625659260192).

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

56399895917568 is a wasteful number, since it uses less digits than its factorization.

56399895917568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632 (or 7598 counting only the distinct ones).

The product of its digits is 39680928000, while the sum is 90.

The spelling of 56399895917568 in words is "fifty-six trillion, three hundred ninety-nine billion, eight hundred ninety-five million, nine hundred seventeen thousand, five hundred sixty-eight".