56569553920 has 176 divisors, whose sum is σ = 152817163776. Its totient is φ = 19906560000.

The previous prime is 56569553891. The next prime is 56569553927. The reversal of 56569553920 is 2935596565.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×56569553920² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is not an unprimeable number, because it can be changed into a prime (56569553927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1729720 + ... + 1762120.

Almost surely, 2^56569553920 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 56569553920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76408581888).

56569553920 is an abundant number, since it is smaller than the sum of its proper divisors (96247609856).

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

56569553920 is a wasteful number, since it uses less digits than its factorization.

56569553920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32468 (or 32450 counting only the distinct ones).

The product of its (nonzero) digits is 10935000, while the sum is 55.

The spelling of 56569553920 in words is "fifty-six billion, five hundred sixty-nine million, five hundred fifty-three thousand, nine hundred twenty".