320509765116799 has 2 divisors, whose sum is σ = 320509765116800. Its totient is φ = 320509765116798.

The previous prime is 320509765116743. The next prime is 320509765116809. The reversal of 320509765116799 is 997611567905023.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320509765116799 - 2²³ = 320509756728191 is a prime.

It is a super-2 number, since 2×320509765116799² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320509765126799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160254882558399 + 160254882558400.

It is an arithmetic number, because the mean of its divisors is an integer number (160254882558400).

Almost surely, 2^{320509765116799} is an apocalyptic number.

320509765116799 is a deficient number, since it is larger than the sum of its proper divisors (1).

320509765116799 is an equidigital number, since it uses as much as digits as its factorization.

320509765116799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192893400, while the sum is 70.

The spelling of 320509765116799 in words is "three hundred twenty trillion, five hundred nine billion, seven hundred sixty-five million, one hundred sixteen thousand, seven hundred ninety-nine".