316618376621 has 2 divisors, whose sum is σ = 316618376622. Its totient is φ = 316618376620.

The previous prime is 316618376587. The next prime is 316618376689. The reversal of 316618376621 is 126673816613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312130046596 + 4488330025 = 558686^2 + 66995^2 .

It is an emirp because it is prime and its reverse (126673816613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 316618376621 - 2²⁶ = 316551267757 is a prime.

It is a super-3 number, since 3×316618376621³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 316618376621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (316618346621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158309188310 + 158309188311.

It is an arithmetic number, because the mean of its divisors is an integer number (158309188311).

Almost surely, 2^316618376621 is an apocalyptic number.

It is an amenable number.

316618376621 is a deficient number, since it is larger than the sum of its proper divisors (1).

316618376621 is an equidigital number, since it uses as much as digits as its factorization.

316618376621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The spelling of 316618376621 in words is "three hundred sixteen billion, six hundred eighteen million, three hundred seventy-six thousand, six hundred twenty-one".