320056123552657 has 2 divisors, whose sum is σ = 320056123552658. Its totient is φ = 320056123552656.

The previous prime is 320056123552483. The next prime is 320056123552667. The reversal of 320056123552657 is 756255321650023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255327034849936 + 64729088702721 = 15978956^2 + 8045439^2 .

It is a cyclic number.

It is not a de Polignac number, because 320056123552657 - 2³⁹ = 319506367738769 is a prime.

It is not a weakly prime, because it can be changed into another prime (320056123552667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160028061776328 + 160028061776329.

It is an arithmetic number, because the mean of its divisors is an integer number (160028061776329).

Almost surely, 2^{320056123552657} is an apocalyptic number.

It is an amenable number.

320056123552657 is a deficient number, since it is larger than the sum of its proper divisors (1).

320056123552657 is an equidigital number, since it uses as much as digits as its factorization.

320056123552657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340000, while the sum is 52.

The spelling of 320056123552657 in words is "three hundred twenty trillion, fifty-six billion, one hundred twenty-three million, five hundred fifty-two thousand, six hundred fifty-seven".