56217020720 has 40 divisors (see below), whose sum is σ = 149376656544. Its totient is φ = 19274406912.

The previous prime is 56217020701. The next prime is 56217020747. The reversal of 56217020720 is 2702071265.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50193209 + ... + 50194328.

Almost surely, 2^56217020720 is an apocalyptic number.

It is an amenable number.

56217020720 is an abundant number, since it is smaller than the sum of its proper divisors (93159635824).

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

56217020720 is a wasteful number, since it uses less digits than its factorization.

56217020720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100387557 (or 100387551 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

Adding to 56217020720 its reverse (2702071265), we get a palindrome (58919091985).

The spelling of 56217020720 in words is "fifty-six billion, two hundred seventeen million, twenty thousand, seven hundred twenty".