56311591851 has 16 divisors (see below), whose sum is σ = 83428693920. Its totient is φ = 37539210240.

The previous prime is 56311591811. The next prime is 56311591879. The reversal of 56311591851 is 15819511365.

56311591851 is a `hidden beast` number, since 5 + 6 + 3 + 1 + 1 + 591 + 8 + 51 = 666.

It is not a de Polignac number, because 56311591851 - 2¹⁰ = 56311590827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56311591797 and 56311591806.

It is not an unprimeable number, because it can be changed into a prime (56311591801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712891 + ... + 787931.

It is an arithmetic number, because the mean of its divisors is an integer number (5214293370).

Almost surely, 2^56311591851 is an apocalyptic number.

56311591851 is a deficient number, since it is larger than the sum of its proper divisors (27117102069).

56311591851 is a wasteful number, since it uses less digits than its factorization.

56311591851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102843 (or 102837 counting only the distinct ones).

The product of its digits is 162000, while the sum is 45.

The spelling of 56311591851 in words is "fifty-six billion, three hundred eleven million, five hundred ninety-one thousand, eight hundred fifty-one".