318640939717 has 8 divisors (see below), whose sum is σ = 327120742872. Its totient is φ = 310194854400.

The previous prime is 318640939711. The next prime is 318640939741. The reversal of 318640939717 is 717939046813.

It can be written as a sum of positive squares in 4 ways, for example, as 35139002116 + 283501937601 = 187454^2 + 532449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 318640939717 - 2³ = 318640939709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318640939711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8410308 + ... + 8448109.

It is an arithmetic number, because the mean of its divisors is an integer number (40890092859).

Almost surely, 2^318640939717 is an apocalyptic number.

It is an amenable number.

318640939717 is a deficient number, since it is larger than the sum of its proper divisors (8479803155).

318640939717 is a wasteful number, since it uses less digits than its factorization.

318640939717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16858919.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 318640939717 in words is "three hundred eighteen billion, six hundred forty million, nine hundred thirty-nine thousand, seven hundred seventeen".