318858412693 has 2 divisors, whose sum is σ = 318858412694. Its totient is φ = 318858412692.

The previous prime is 318858412679. The next prime is 318858412721. The reversal of 318858412693 is 396214858813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180993237489 + 137865175204 = 425433^2 + 371302^2 .

It is a cyclic number.

It is not a de Polignac number, because 318858412693 - 2⁹ = 318858412181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318858412793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159429206346 + 159429206347.

It is an arithmetic number, because the mean of its divisors is an integer number (159429206347).

Almost surely, 2^318858412693 is an apocalyptic number.

It is an amenable number.

318858412693 is a deficient number, since it is larger than the sum of its proper divisors (1).

318858412693 is an equidigital number, since it uses as much as digits as its factorization.

318858412693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 58.

The spelling of 318858412693 in words is "three hundred eighteen billion, eight hundred fifty-eight million, four hundred twelve thousand, six hundred ninety-three".