56160610721 has 4 divisors (see below), whose sum is σ = 56161108500. Its totient is φ = 56160112944.

The previous prime is 56160610711. The next prime is 56160610873. The reversal of 56160610721 is 12701606165.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 30541407121 + 25619203600 = 174761^2 + 160060^2 .

It is a cyclic number.

It is not a de Polignac number, because 56160610721 - 2⁶ = 56160610657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56160610711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10355 + ... + 335303.

It is an arithmetic number, because the mean of its divisors is an integer number (14040277125).

Almost surely, 2^56160610721 is an apocalyptic number.

It is an amenable number.

56160610721 is a deficient number, since it is larger than the sum of its proper divisors (497779).

56160610721 is a wasteful number, since it uses less digits than its factorization.

56160610721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497778.

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 56160610721 in words is "fifty-six billion, one hundred sixty million, six hundred ten thousand, seven hundred twenty-one".