318666944917 has 2 divisors, whose sum is σ = 318666944918. Its totient is φ = 318666944916.

The previous prime is 318666944879. The next prime is 318666944923. The reversal of 318666944917 is 719449666813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229058917201 + 89608027716 = 478601^2 + 299346^2 .

It is a cyclic number.

It is not a de Polignac number, because 318666944917 - 2⁷ = 318666944789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318666944117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159333472458 + 159333472459.

It is an arithmetic number, because the mean of its divisors is an integer number (159333472459).

Almost surely, 2^318666944917 is an apocalyptic number.

It is an amenable number.

318666944917 is a deficient number, since it is larger than the sum of its proper divisors (1).

318666944917 is an equidigital number, since it uses as much as digits as its factorization.

318666944917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 64.

The spelling of 318666944917 in words is "three hundred eighteen billion, six hundred sixty-six million, nine hundred forty-four thousand, nine hundred seventeen".