320056660424681 has 2 divisors, whose sum is σ = 320056660424682. Its totient is φ = 320056660424680.

The previous prime is 320056660424653. The next prime is 320056660424803. The reversal of 320056660424681 is 186424066650023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304806729451225 + 15249930973456 = 17458715^2 + 3905116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320056660424681 is a prime.

It is a super-2 number, since 2×320056660424681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320056660424651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160028330212340 + 160028330212341.

It is an arithmetic number, because the mean of its divisors is an integer number (160028330212341).

Almost surely, 2^{320056660424681} is an apocalyptic number.

It is an amenable number.

320056660424681 is a deficient number, since it is larger than the sum of its proper divisors (1).

320056660424681 is an equidigital number, since it uses as much as digits as its factorization.

320056660424681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 53.

The spelling of 320056660424681 in words is "three hundred twenty trillion, fifty-six billion, six hundred sixty million, four hundred twenty-four thousand, six hundred eighty-one".