318346981981686 has 24 divisors (see below), whose sum is σ = 788287764907344. Its totient is φ = 90956280566160.

The previous prime is 318346981981663. The next prime is 318346981981723. The reversal of 318346981981686 is 686189189643813.

It is a happy number.

318346981981686 is a `hidden beast` number, since 3 + 1 + 8 + 3 + 469 + 8 + 1 + 98 + 1 + 68 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1263281674405 + ... + 1263281674656.

It is an arithmetic number, because the mean of its divisors is an integer number (32845323537806).

Almost surely, 2^{318346981981686} is an apocalyptic number.

318346981981686 is an abundant number, since it is smaller than the sum of its proper divisors (469940782925658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318346981981686 is a wasteful number, since it uses less digits than its factorization.

318346981981686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526563349076 (or 2526563349073 counting only the distinct ones).

The product of its digits is 2579890176, while the sum is 81.

The spelling of 318346981981686 in words is "three hundred eighteen trillion, three hundred forty-six billion, nine hundred eighty-one million, nine hundred eighty-one thousand, six hundred eighty-six".