363972730657 has 2 divisors, whose sum is σ = 363972730658. Its totient is φ = 363972730656.

The previous prime is 363972730619. The next prime is 363972730663. The reversal of 363972730657 is 756037279363.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351914714176 + 12058016481 = 593224^2 + 109809^2 .

It is a cyclic number.

It is not a de Polignac number, because 363972730657 - 2¹⁹ = 363972206369 is a prime.

It is a super-2 number, since 2×363972730657² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (363972730607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181986365328 + 181986365329.

It is an arithmetic number, because the mean of its divisors is an integer number (181986365329).

Almost surely, 2^363972730657 is an apocalyptic number.

It is an amenable number.

363972730657 is a deficient number, since it is larger than the sum of its proper divisors (1).

363972730657 is an equidigital number, since it uses as much as digits as its factorization.

363972730657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30005640, while the sum is 58.

The spelling of 363972730657 in words is "three hundred sixty-three billion, nine hundred seventy-two million, seven hundred thirty thousand, six hundred fifty-seven".