320072310443621 has 2 divisors, whose sum is σ = 320072310443622. Its totient is φ = 320072310443620.

The previous prime is 320072310443603. The next prime is 320072310443623. The reversal of 320072310443621 is 126344013270023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243584254838596 + 76488055605025 = 15607186^2 + 8745745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320072310443621 is a prime.

Together with 320072310443623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320072310443623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160036155221810 + 160036155221811.

It is an arithmetic number, because the mean of its divisors is an integer number (160036155221811).

Almost surely, 2^{320072310443621} is an apocalyptic number.

It is an amenable number.

320072310443621 is a deficient number, since it is larger than the sum of its proper divisors (1).

320072310443621 is an equidigital number, since it uses as much as digits as its factorization.

320072310443621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 38.

The spelling of 320072310443621 in words is "three hundred twenty trillion, seventy-two billion, three hundred ten million, four hundred forty-three thousand, six hundred twenty-one".