312865902909 has 12 divisors (see below), whose sum is σ = 516477046176. Its totient is φ = 178780515912.

The previous prime is 312865902841. The next prime is 312865902913. The reversal of 312865902909 is 909209568213.

It is a happy number.

312865902909 is a `hidden beast` number, since 3 + 1 + 28 + 6 + 590 + 29 + 0 + 9 = 666.

It is not a de Polignac number, because 312865902909 - 2⁸ = 312865902653 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312865902409) 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 in 11 ways as a sum of consecutive naturals, for example, 2483062659 + ... + 2483062784.

It is an arithmetic number, because the mean of its divisors is an integer number (43039753848).

Almost surely, 2^312865902909 is an apocalyptic number.

It is an amenable number.

312865902909 is a deficient number, since it is larger than the sum of its proper divisors (203611143267).

312865902909 is a wasteful number, since it uses less digits than its factorization.

312865902909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4966125456 (or 4966125453 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 312865902909 in words is "three hundred twelve billion, eight hundred sixty-five million, nine hundred two thousand, nine hundred nine".