56560266721 has 16 divisors (see below), whose sum is σ = 68451250176. Its totient is φ = 45622734336.

The previous prime is 56560266671. The next prime is 56560266731. The reversal of 56560266721 is 12766206565.

It is a cyclic number.

It is not a de Polignac number, because 56560266721 - 2⁹ = 56560266209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56560266731) 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 15 ways as a sum of consecutive naturals, for example, 1105120 + ... + 1155166.

It is an arithmetic number, because the mean of its divisors is an integer number (4278203136).

Almost surely, 2^56560266721 is an apocalyptic number.

It is an amenable number.

56560266721 is a deficient number, since it is larger than the sum of its proper divisors (11890983455).

56560266721 is a wasteful number, since it uses less digits than its factorization.

56560266721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59568.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 56560266721 in words is "fifty-six billion, five hundred sixty million, two hundred sixty-six thousand, seven hundred twenty-one".