56121665316 has 24 divisors (see below), whose sum is σ = 130963969920. Its totient is φ = 18705304992.

The previous prime is 56121665297. The next prime is 56121665339. The reversal of 56121665316 is 61356612165.

It is a super-2 number, since 2×56121665316² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115011 + ... + 354218.

It is an arithmetic number, because the mean of its divisors is an integer number (5456832080).

Almost surely, 2^56121665316 is an apocalyptic number.

It is an amenable number.

56121665316 is an abundant number, since it is smaller than the sum of its proper divisors (74842304604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56121665316 is a wasteful number, since it uses less digits than its factorization.

56121665316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479203 (or 479201 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The spelling of 56121665316 in words is "fifty-six billion, one hundred twenty-one million, six hundred sixty-five thousand, three hundred sixteen".