312516870878 has 32 divisors (see below), whose sum is σ = 494481918240. Its totient is φ = 147724318080.

The previous prime is 312516870857. The next prime is 312516870889. The reversal of 312516870878 is 878078615213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87269048 + ... + 87272628.

It is an arithmetic number, because the mean of its divisors is an integer number (15452559945).

Almost surely, 2^312516870878 is an apocalyptic number.

312516870878 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

312516870878 is a deficient number, since it is larger than the sum of its proper divisors (181965047362).

312516870878 is a wasteful number, since it uses less digits than its factorization.

312516870878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 312516870878 in words is "three hundred twelve billion, five hundred sixteen million, eight hundred seventy thousand, eight hundred seventy-eight".