312881631894 has 96 divisors (see below), whose sum is σ = 739814275200. Its totient is φ = 94986328320.

The previous prime is 312881631869. The next prime is 312881631949. The reversal of 312881631894 is 498136188213.

312881631894 is a `hidden beast` number, since 31 + 288 + 16 + 318 + 9 + 4 = 666.

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 self number, because there is not a number n which added to its sum of digits gives 312881631894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30848064 + ... + 30858204.

It is an arithmetic number, because the mean of its divisors is an integer number (7706398700).

Almost surely, 2^312881631894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312881631894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369907137600).

312881631894 is an abundant number, since it is smaller than the sum of its proper divisors (426932643306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312881631894 is a wasteful number, since it uses less digits than its factorization.

312881631894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11910 (or 11907 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 312881631894 in words is "three hundred twelve billion, eight hundred eighty-one million, six hundred thirty-one thousand, eight hundred ninety-four".