318861117272 has 8 divisors (see below), whose sum is σ = 597864594900. Its totient is φ = 159430558632.

The previous prime is 318861117271. The next prime is 318861117317. The reversal of 318861117272 is 272711168813.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318861117271) 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, 19928819822 + ... + 19928819837.

Almost surely, 2^318861117272 is an apocalyptic number.

It is an amenable number.

318861117272 is a deficient number, since it is larger than the sum of its proper divisors (279003477628).

318861117272 is a wasteful number, since it uses less digits than its factorization.

318861117272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39857639665 (or 39857639661 counting only the distinct ones).

The product of its digits is 225792, while the sum is 47.

The spelling of 318861117272 in words is "three hundred eighteen billion, eight hundred sixty-one million, one hundred seventeen thousand, two hundred seventy-two".