312516870877 has 4 divisors (see below), whose sum is σ = 312523642336. Its totient is φ = 312510099420.

The previous prime is 312516870857. The next prime is 312516870889. The reversal of 312516870877 is 778078615213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312516870877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312516870817) 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, 3316023 + ... + 3408964.

It is an arithmetic number, because the mean of its divisors is an integer number (78130910584).

Almost surely, 2^312516870877 is an apocalyptic number.

It is an amenable number.

312516870877 is a deficient number, since it is larger than the sum of its proper divisors (6771459).

312516870877 is an equidigital number, since it uses as much as digits as its factorization.

312516870877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6771458.

The product of its (nonzero) digits is 3951360, while the sum is 55.

The spelling of 312516870877 in words is "three hundred twelve billion, five hundred sixteen million, eight hundred seventy thousand, eight hundred seventy-seven".