312686061887 has 4 divisors (see below), whose sum is σ = 326281108080. Its totient is φ = 299091015696.

The previous prime is 312686061839. The next prime is 312686061923. The reversal of 312686061887 is 788160686213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312686061887 - 2²⁸ = 312417626431 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 (312686061817) 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, 6797523062 + ... + 6797523107.

It is an arithmetic number, because the mean of its divisors is an integer number (81570277020).

Almost surely, 2^312686061887 is an apocalyptic number.

312686061887 is a deficient number, since it is larger than the sum of its proper divisors (13595046193).

312686061887 is a wasteful number, since it uses less digits than its factorization.

312686061887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13595046192.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 312686061887 in words is "three hundred twelve billion, six hundred eighty-six million, sixty-one thousand, eight hundred eighty-seven".