56695921361 has 4 divisors (see below), whose sum is σ = 57472577892. Its totient is φ = 55919264832.

The previous prime is 56695921351. The next prime is 56695921423. The reversal of 56695921361 is 16312959665.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28008030736 + 28687890625 = 167356^2 + 169375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56695921361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56695921351) 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 3 ways as a sum of consecutive naturals, for example, 388328156 + ... + 388328301.

It is an arithmetic number, because the mean of its divisors is an integer number (14368144473).

Almost surely, 2^56695921361 is an apocalyptic number.

It is an amenable number.

56695921361 is a deficient number, since it is larger than the sum of its proper divisors (776656531).

56695921361 is an equidigital number, since it uses as much as digits as its factorization.

56695921361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776656530.

The product of its digits is 2624400, while the sum is 53.

The spelling of 56695921361 in words is "fifty-six billion, six hundred ninety-five million, nine hundred twenty-one thousand, three hundred sixty-one".