320343743455993 has 2 divisors, whose sum is σ = 320343743455994. Its totient is φ = 320343743455992.

The previous prime is 320343743455963. The next prime is 320343743456039. The reversal of 320343743455993 is 399554347343023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241919045740009 + 78424697715984 = 15553747^2 + 8855772^2 .

It is a cyclic number.

It is not a de Polignac number, because 320343743455993 - 2⁵ = 320343743455961 is a prime.

It is a super-2 number, since 2×320343743455993² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320343743455913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160171871727996 + 160171871727997.

It is an arithmetic number, because the mean of its divisors is an integer number (160171871727997).

Almost surely, 2^{320343743455993} is an apocalyptic number.

It is an amenable number.

320343743455993 is a deficient number, since it is larger than the sum of its proper divisors (1).

320343743455993 is an equidigital number, since it uses as much as digits as its factorization.

320343743455993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 440899200, while the sum is 64.

The spelling of 320343743455993 in words is "three hundred twenty trillion, three hundred forty-three billion, seven hundred forty-three million, four hundred fifty-five thousand, nine hundred ninety-three".