56716120709 has 2 divisors, whose sum is σ = 56716120710. Its totient is φ = 56716120708.

The previous prime is 56716120597. The next prime is 56716120717. The reversal of 56716120709 is 90702161765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44812656100 + 11903464609 = 211690^2 + 109103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56716120709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56716120709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56716120759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28358060354 + 28358060355.

It is an arithmetic number, because the mean of its divisors is an integer number (28358060355).

Almost surely, 2^56716120709 is an apocalyptic number.

It is an amenable number.

56716120709 is a deficient number, since it is larger than the sum of its proper divisors (1).

56716120709 is an equidigital number, since it uses as much as digits as its factorization.

56716120709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 56716120709 in words is "fifty-six billion, seven hundred sixteen million, one hundred twenty thousand, seven hundred nine".