318918843441 has 81 divisors (see below), whose sum is σ = 514309614273. Its totient is φ = 190291083840.

The previous prime is 318918843431. The next prime is 318918843449. The reversal of 318918843441 is 144348819813.

The square root of 318918843441 is 564729.

It is a perfect power (a square), and thus also a powerful number.

318918843441 is a `hidden beast` number, since 3 + 1 + 8 + 91 + 88 + 434 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 37271025 + 318881572416 = 6105^2 + 564696^2 .

It is a de Polignac number, because none of the positive numbers 2^k-318918843441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (318918843449) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2031330135 + ... + 2031330291.

Almost surely, 2^318918843441 is an apocalyptic number.

318918843441 is the 564729-th square number.

318918843441 is the 282365-th centered octagonal number.

It is an amenable number.

318918843441 is a deficient number, since it is larger than the sum of its proper divisors (195390770832).

318918843441 is a wasteful number, since it uses less digits than its factorization.

318918843441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 280 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 318918843441 in words is "three hundred eighteen billion, nine hundred eighteen million, eight hundred forty-three thousand, four hundred forty-one".