56144331361 has 4 divisors (see below), whose sum is σ = 56179140372. Its totient is φ = 56109522352.

The previous prime is 56144331349. The next prime is 56144331379. The reversal of 56144331361 is 16313344165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16313344165 = 5 ⋅3262668833.

It can be written as a sum of positive squares in 2 ways, for example, as 22129537600 + 34014793761 = 148760^2 + 184431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56144331361 is a prime.

It is a super-2 number, since 2×56144331361² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56144331361.

It is not an unprimeable number, because it can be changed into a prime (56144331301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17402086 + ... + 17405311.

It is an arithmetic number, because the mean of its divisors is an integer number (14044785093).

Almost surely, 2^56144331361 is an apocalyptic number.

It is an amenable number.

56144331361 is a deficient number, since it is larger than the sum of its proper divisors (34809011).

56144331361 is a wasteful number, since it uses less digits than its factorization.

56144331361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34809010.

The product of its digits is 77760, while the sum is 37.

The spelling of 56144331361 in words is "fifty-six billion, one hundred forty-four million, three hundred thirty-one thousand, three hundred sixty-one".