318648044809 has 2 divisors, whose sum is σ = 318648044810. Its totient is φ = 318648044808.

The previous prime is 318648044807. The next prime is 318648044831. The reversal of 318648044809 is 908440846813.

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., 301370256784 + 17277788025 = 548972^2 + 131445^2 .

It is a cyclic number.

It is not a de Polignac number, because 318648044809 - 2¹ = 318648044807 is a prime.

Together with 318648044807, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 318648044809.

It is not a weakly prime, because it can be changed into another prime (318648044807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159324022404 + 159324022405.

It is an arithmetic number, because the mean of its divisors is an integer number (159324022405).

Almost surely, 2^318648044809 is an apocalyptic number.

It is an amenable number.

318648044809 is a deficient number, since it is larger than the sum of its proper divisors (1).

318648044809 is an equidigital number, since it uses as much as digits as its factorization.

318648044809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5308416, while the sum is 55.

The spelling of 318648044809 in words is "three hundred eighteen billion, six hundred forty-eight million, forty-four thousand, eight hundred nine".