56461312731 has 16 divisors (see below), whose sum is σ = 75852983808. Its totient is φ = 37355976000.

The previous prime is 56461312681. The next prime is 56461312753. The reversal of 56461312731 is 13721316465.

It is not a de Polignac number, because 56461312731 - 2⁷ = 56461312603 is a prime.

It is a super-2 number, since 2×56461312731² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56461312731.

It is not an unprimeable number, because it can be changed into a prime (56461312031) 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 15 ways as a sum of consecutive naturals, for example, 226831 + ... + 405431.

It is an arithmetic number, because the mean of its divisors is an integer number (4740811488).

Almost surely, 2^56461312731 is an apocalyptic number.

56461312731 is a deficient number, since it is larger than the sum of its proper divisors (19391671077).

56461312731 is a wasteful number, since it uses less digits than its factorization.

56461312731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179402.

The product of its digits is 90720, while the sum is 39.

The spelling of 56461312731 in words is "fifty-six billion, four hundred sixty-one million, three hundred twelve thousand, seven hundred thirty-one".