318861655512 has 16 divisors (see below), whose sum is σ = 797154138840. Its totient is φ = 106287218496.

The previous prime is 318861655481. The next prime is 318861655513. The reversal of 318861655512 is 215556168813.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318861655513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6642951133 + ... + 6642951180.

Almost surely, 2^318861655512 is an apocalyptic number.

It is an amenable number.

318861655512 is an abundant number, since it is smaller than the sum of its proper divisors (478292483328).

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

318861655512 is a wasteful number, since it uses less digits than its factorization.

318861655512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285902322 (or 13285902318 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 51.

The spelling of 318861655512 in words is "three hundred eighteen billion, eight hundred sixty-one million, six hundred fifty-five thousand, five hundred twelve".