318742704967649 has 2 divisors, whose sum is σ = 318742704967650. Its totient is φ = 318742704967648.

The previous prime is 318742704967607. The next prime is 318742704967721. The reversal of 318742704967649 is 946769407247813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193443785277649 + 125298919690000 = 13908407^2 + 11193700^2 .

It is a cyclic number.

It is not a de Polignac number, because 318742704967649 - 2¹⁶ = 318742704902113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 318742704967649.

It is not a weakly prime, because it can be changed into another prime (318742704967949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159371352483824 + 159371352483825.

It is an arithmetic number, because the mean of its divisors is an integer number (159371352483825).

Almost surely, 2^{318742704967649} is an apocalyptic number.

It is an amenable number.

318742704967649 is a deficient number, since it is larger than the sum of its proper divisors (1).

318742704967649 is an equidigital number, since it uses as much as digits as its factorization.

318742704967649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072577536, while the sum is 77.

The spelling of 318742704967649 in words is "three hundred eighteen trillion, seven hundred forty-two billion, seven hundred four million, nine hundred sixty-seven thousand, six hundred forty-nine".