320072310443521 has 2 divisors, whose sum is σ = 320072310443522. Its totient is φ = 320072310443520.

The previous prime is 320072310443467. The next prime is 320072310443603. The reversal of 320072310443521 is 125344013270023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257118178359025 + 62954132084496 = 16034905^2 + 7934364^2 .

It is a cyclic number.

It is not a de Polignac number, because 320072310443521 - 2⁹ = 320072310443009 is a prime.

It is not a weakly prime, because it can be changed into another prime (320072310443621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160036155221760 + 160036155221761.

It is an arithmetic number, because the mean of its divisors is an integer number (160036155221761).

Almost surely, 2^{320072310443521} is an apocalyptic number.

It is an amenable number.

320072310443521 is a deficient number, since it is larger than the sum of its proper divisors (1).

320072310443521 is an equidigital number, since it uses as much as digits as its factorization.

320072310443521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 37.

The spelling of 320072310443521 in words is "three hundred twenty trillion, seventy-two billion, three hundred ten million, four hundred forty-three thousand, five hundred twenty-one".