320057800721 has 2 divisors, whose sum is σ = 320057800722. Its totient is φ = 320057800720.

The previous prime is 320057800687. The next prime is 320057800753. The reversal of 320057800721 is 127008750023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304774660096 + 15283140625 = 552064^2 + 123625^2 .

It is a cyclic number.

It is not a de Polignac number, because 320057800721 - 2¹⁰ = 320057799697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (320057803721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160028900360 + 160028900361.

It is an arithmetic number, because the mean of its divisors is an integer number (160028900361).

Almost surely, 2^320057800721 is an apocalyptic number.

It is an amenable number.

320057800721 is a deficient number, since it is larger than the sum of its proper divisors (1).

320057800721 is an equidigital number, since it uses as much as digits as its factorization.

320057800721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The spelling of 320057800721 in words is "three hundred twenty billion, fifty-seven million, eight hundred thousand, seven hundred twenty-one".