316616644639 has 2 divisors, whose sum is σ = 316616644640. Its totient is φ = 316616644638.

The previous prime is 316616644637. The next prime is 316616644717. The reversal of 316616644639 is 936446616613.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (936446616613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316616644639 - 2¹ = 316616644637 is a prime.

Together with 316616644637, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 316616644639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316616644637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158308322319 + 158308322320.

It is an arithmetic number, because the mean of its divisors is an integer number (158308322320).

Almost surely, 2^316616644639 is an apocalyptic number.

316616644639 is a deficient number, since it is larger than the sum of its proper divisors (1).

316616644639 is an equidigital number, since it uses as much as digits as its factorization.

316616644639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 55.

The spelling of 316616644639 in words is "three hundred sixteen billion, six hundred sixteen million, six hundred forty-four thousand, six hundred thirty-nine".