318680833217 has 2 divisors, whose sum is σ = 318680833218. Its totient is φ = 318680833216.

The previous prime is 318680833199. The next prime is 318680833231. The reversal of 318680833217 is 712338086813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277770107521 + 40910725696 = 527039^2 + 202264^2 .

It is a cyclic number.

It is not a de Polignac number, because 318680833217 - 2¹⁰ = 318680832193 is a prime.

It is not a weakly prime, because it can be changed into another prime (318680833277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159340416608 + 159340416609.

It is an arithmetic number, because the mean of its divisors is an integer number (159340416609).

Almost surely, 2^318680833217 is an apocalyptic number.

It is an amenable number.

318680833217 is a deficient number, since it is larger than the sum of its proper divisors (1).

318680833217 is an equidigital number, since it uses as much as digits as its factorization.

318680833217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 318680833217 in words is "three hundred eighteen billion, six hundred eighty million, eight hundred thirty-three thousand, two hundred seventeen".