318636326641 has 2 divisors, whose sum is σ = 318636326642. Its totient is φ = 318636326640.

The previous prime is 318636326599. The next prime is 318636326653. The reversal of 318636326641 is 146623636813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233220419041 + 85415907600 = 482929^2 + 292260^2 .

It is a cyclic number.

It is not a de Polignac number, because 318636326641 - 2¹⁵ = 318636293873 is a prime.

It is not a weakly prime, because it can be changed into another prime (318636324641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159318163320 + 159318163321.

It is an arithmetic number, because the mean of its divisors is an integer number (159318163321).

Almost surely, 2^318636326641 is an apocalyptic number.

It is an amenable number.

318636326641 is a deficient number, since it is larger than the sum of its proper divisors (1).

318636326641 is an equidigital number, since it uses as much as digits as its factorization.

318636326641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 49.

The spelling of 318636326641 in words is "three hundred eighteen billion, six hundred thirty-six million, three hundred twenty-six thousand, six hundred forty-one".