318667325993 has 2 divisors, whose sum is σ = 318667325994. Its totient is φ = 318667325992.

The previous prime is 318667325983. The next prime is 318667326023. The reversal of 318667325993 is 399523766813.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218904208384 + 99763117609 = 467872^2 + 315853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318667325993 is a prime.

It is not a weakly prime, because it can be changed into another prime (318667325953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159333662996 + 159333662997.

It is an arithmetic number, because the mean of its divisors is an integer number (159333662997).

Almost surely, 2^318667325993 is an apocalyptic number.

It is an amenable number.

318667325993 is a deficient number, since it is larger than the sum of its proper divisors (1).

318667325993 is an equidigital number, since it uses as much as digits as its factorization.

318667325993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44089920, while the sum is 62.

The spelling of 318667325993 in words is "three hundred eighteen billion, six hundred sixty-seven million, three hundred twenty-five thousand, nine hundred ninety-three".