56928748721 has 8 divisors (see below), whose sum is σ = 61349924160. Its totient is φ = 52513579152.

The previous prime is 56928748703. The next prime is 56928748733. The reversal of 56928748721 is 12784782965.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56928748721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56928748741) by changing a digit.

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, 1481765 + ... + 1519698.

It is an arithmetic number, because the mean of its divisors is an integer number (7668740520).

Almost surely, 2^56928748721 is an apocalyptic number.

It is an amenable number.

56928748721 is a deficient number, since it is larger than the sum of its proper divisors (4421175439).

56928748721 is a wasteful number, since it uses less digits than its factorization.

56928748721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002935.

The product of its digits is 13547520, while the sum is 59.

The spelling of 56928748721 in words is "fifty-six billion, nine hundred twenty-eight million, seven hundred forty-eight thousand, seven hundred twenty-one".