316330646435521 has 2 divisors, whose sum is σ = 316330646435522. Its totient is φ = 316330646435520.

The previous prime is 316330646435519. The next prime is 316330646435623. The reversal of 316330646435521 is 125534646033613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296224166234896 + 20106480200625 = 17211164^2 + 4484025^2 .

It is a cyclic number.

It is not a de Polignac number, because 316330646435521 - 2¹ = 316330646435519 is a prime.

Together with 316330646435519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (316330646235521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158165323217760 + 158165323217761.

It is an arithmetic number, because the mean of its divisors is an integer number (158165323217761).

Almost surely, 2^{316330646435521} is an apocalyptic number.

It is an amenable number.

316330646435521 is a deficient number, since it is larger than the sum of its proper divisors (1).

316330646435521 is an equidigital number, since it uses as much as digits as its factorization.

316330646435521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13996800, while the sum is 52.

The spelling of 316330646435521 in words is "three hundred sixteen trillion, three hundred thirty billion, six hundred forty-six million, four hundred thirty-five thousand, five hundred twenty-one".