318625213117 has 2 divisors, whose sum is σ = 318625213118. Its totient is φ = 318625213116.

The previous prime is 318625213079. The next prime is 318625213141. The reversal of 318625213117 is 711312526813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180676853721 + 137948359396 = 425061^2 + 371414^2 .

It is a cyclic number.

It is not a de Polignac number, because 318625213117 - 2⁷ = 318625212989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318625213117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318625213817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159312606558 + 159312606559.

It is an arithmetic number, because the mean of its divisors is an integer number (159312606559).

Almost surely, 2^318625213117 is an apocalyptic number.

It is an amenable number.

318625213117 is a deficient number, since it is larger than the sum of its proper divisors (1).

318625213117 is an equidigital number, since it uses as much as digits as its factorization.

318625213117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The spelling of 318625213117 in words is "three hundred eighteen billion, six hundred twenty-five million, two hundred thirteen thousand, one hundred seventeen".