318497433991 has 16 divisors (see below), whose sum is σ = 357444472320. Its totient is φ = 281321932320.

The previous prime is 318497433959. The next prime is 318497434051. The reversal of 318497433991 is 199334794813.

It is not a de Polignac number, because 318497433991 - 2⁵ = 318497433959 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 (318497434991) 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, 2591931 + ... + 2712028.

It is an arithmetic number, because the mean of its divisors is an integer number (22340279520).

Almost surely, 2^318497433991 is an apocalyptic number.

318497433991 is a deficient number, since it is larger than the sum of its proper divisors (38947038329).

318497433991 is a wasteful number, since it uses less digits than its factorization.

318497433991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304126.

The product of its digits is 17635968, while the sum is 61.

The spelling of 318497433991 in words is "three hundred eighteen billion, four hundred ninety-seven million, four hundred thirty-three thousand, nine hundred ninety-one".