316344020443621 has 2 divisors, whose sum is σ = 316344020443622. Its totient is φ = 316344020443620.

The previous prime is 316344020443609. The next prime is 316344020443631. The reversal of 316344020443621 is 126344020443613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282136857424900 + 34207163018721 = 16796930^2 + 5848689^2 .

It is a cyclic number.

It is not a de Polignac number, because 316344020443621 - 2²¹ = 316344018346469 is a prime.

It is a super-4 number, since 4×316344020443621⁴ (a number of 59 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316344020443631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158172010221810 + 158172010221811.

It is an arithmetic number, because the mean of its divisors is an integer number (158172010221811).

Almost surely, 2^{316344020443621} is an apocalyptic number.

It is an amenable number.

316344020443621 is a deficient number, since it is larger than the sum of its proper divisors (1).

316344020443621 is an equidigital number, since it uses as much as digits as its factorization.

316344020443621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 43.

The spelling of 316344020443621 in words is "three hundred sixteen trillion, three hundred forty-four billion, twenty million, four hundred forty-three thousand, six hundred twenty-one".