56521569313792 has 264 divisors, whose sum is σ = 133918611613920. Its totient is φ = 23745746534400.

The previous prime is 56521569313771. The next prime is 56521569313799. The reversal of 56521569313792 is 29731396512565.

It is a happy number.

It is a super-2 number, since 2×56521569313792² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (56521569313799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96228423 + ... + 96814009.

Almost surely, 2^{56521569313792} 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 56521569313792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66959305806960).

56521569313792 is an abundant number, since it is smaller than the sum of its proper divisors (77397042300128).

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

56521569313792 is a wasteful number, since it uses less digits than its factorization.

56521569313792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585689 (or 585660 counting only the distinct ones).

The product of its digits is 91854000, while the sum is 64.

The spelling of 56521569313792 in words is "fifty-six trillion, five hundred twenty-one billion, five hundred sixty-nine million, three hundred thirteen thousand, seven hundred ninety-two".