56907395861 has 2 divisors, whose sum is σ = 56907395862. Its totient is φ = 56907395860.

The previous prime is 56907395851. The next prime is 56907395891. The reversal of 56907395861 is 16859370965.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38876008900 + 18031386961 = 197170^2 + 134281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56907395861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56907395861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56907395851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28453697930 + 28453697931.

It is an arithmetic number, because the mean of its divisors is an integer number (28453697931).

Almost surely, 2^56907395861 is an apocalyptic number.

It is an amenable number.

56907395861 is a deficient number, since it is larger than the sum of its proper divisors (1).

56907395861 is an equidigital number, since it uses as much as digits as its factorization.

56907395861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 56907395861 in words is "fifty-six billion, nine hundred seven million, three hundred ninety-five thousand, eight hundred sixty-one".