312638876661 has 8 divisors (see below), whose sum is σ = 438791405920. Its totient is φ = 197456132592.

The previous prime is 312638876657. The next prime is 312638876677. The reversal of 312638876661 is 166678836213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312638876661 - 2² = 312638876657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 5484892573 = 312638876661 / (3 + 1 + 2 + 6 + 3 + 8 + 8 + 7 + 6 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312638876611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2742446230 + ... + 2742446343.

It is an arithmetic number, because the mean of its divisors is an integer number (54848925740).

Almost surely, 2^312638876661 is an apocalyptic number.

It is an amenable number.

312638876661 is a deficient number, since it is larger than the sum of its proper divisors (126152529259).

312638876661 is a wasteful number, since it uses less digits than its factorization.

312638876661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484892595.

The product of its digits is 10450944, while the sum is 57.

The spelling of 312638876661 in words is "three hundred twelve billion, six hundred thirty-eight million, eight hundred seventy-six thousand, six hundred sixty-one".