56509729956 has 36 divisors (see below), whose sum is σ = 142920232000. Its totient is φ = 18826529328.

The previous prime is 56509729949. The next prime is 56509729957. The reversal of 56509729956 is 65992790565.

56509729956 is a `hidden beast` number, since 5 + 6 + 509 + 72 + 9 + 9 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 56509729893 and 56509729902.

It is not an unprimeable number, because it can be changed into a prime (56509729957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350056 + ... + 485343.

Almost surely, 2^56509729956 is an apocalyptic number.

It is an amenable number.

56509729956 is an abundant number, since it is smaller than the sum of its proper divisors (86410502044).

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

56509729956 is a wasteful number, since it uses less digits than its factorization.

56509729956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837288 (or 837283 counting only the distinct ones).

The product of its (nonzero) digits is 45927000, while the sum is 63.

The spelling of 56509729956 in words is "fifty-six billion, five hundred nine million, seven hundred twenty-nine thousand, nine hundred fifty-six".