318876044621 has 4 divisors (see below), whose sum is σ = 319269234144. Its totient is φ = 318482855100.

The previous prime is 318876044569. The next prime is 318876044639. The reversal of 318876044621 is 126440678813.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126440678813 = 17 ⋅7437686989.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318876044621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 318876044621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318876044521) 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, 196593545 + ... + 196595166.

It is an arithmetic number, because the mean of its divisors is an integer number (79817308536).

Almost surely, 2^318876044621 is an apocalyptic number.

It is an amenable number.

318876044621 is a deficient number, since it is larger than the sum of its proper divisors (393189523).

318876044621 is an equidigital number, since it uses as much as digits as its factorization.

318876044621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393189522.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 318876044621 in words is "three hundred eighteen billion, eight hundred seventy-six million, forty-four thousand, six hundred twenty-one".