312857855817 has 32 divisors (see below), whose sum is σ = 458391521280. Its totient is φ = 188639530560.

The previous prime is 312857855813. The next prime is 312857855839. The reversal of 312857855817 is 718558758213.

It is not a de Polignac number, because 312857855817 - 2² = 312857855813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312857855813) 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 31 ways as a sum of consecutive naturals, for example, 16038 + ... + 791184.

It is an arithmetic number, because the mean of its divisors is an integer number (14324735040).

Almost surely, 2^312857855817 is an apocalyptic number.

It is an amenable number.

312857855817 is a deficient number, since it is larger than the sum of its proper divisors (145533665463).

312857855817 is a wasteful number, since it uses less digits than its factorization.

312857855817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775373.

The product of its digits is 18816000, while the sum is 60.

The spelling of 312857855817 in words is "three hundred twelve billion, eight hundred fifty-seven million, eight hundred fifty-five thousand, eight hundred seventeen".