318623543391 has 16 divisors (see below), whose sum is σ = 426679423200. Its totient is φ = 211492675968.

The previous prime is 318623543383. The next prime is 318623543423. The reversal of 318623543391 is 193345326813.

It is not a de Polignac number, because 318623543391 - 2³ = 318623543383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318623543391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318623548391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1165165 + ... + 1412393.

It is an arithmetic number, because the mean of its divisors is an integer number (26667463950).

Almost surely, 2^318623543391 is an apocalyptic number.

318623543391 is a deficient number, since it is larger than the sum of its proper divisors (108055879809).

318623543391 is a wasteful number, since it uses less digits than its factorization.

318623543391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249098.

The product of its digits is 1399680, while the sum is 48.

The spelling of 318623543391 in words is "three hundred eighteen billion, six hundred twenty-three million, five hundred forty-three thousand, three hundred ninety-one".