12718784649937 has 2 divisors, whose sum is σ = 12718784649938. Its totient is φ = 12718784649936.

The previous prime is 12718784649931. The next prime is 12718784650069. The reversal of 12718784649937 is 73994648781721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12636027168961 + 82757480976 = 3554719^2 + 287676^2 .

It is a cyclic number.

It is not a de Polignac number, because 12718784649937 - 2²³ = 12718776261329 is a prime.

It is not a weakly prime, because it can be changed into another prime (12718784649931) 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, 6359392324968 + 6359392324969.

It is an arithmetic number, because the mean of its divisors is an integer number (6359392324969).

Almost surely, 2^{12718784649937} is an apocalyptic number.

It is an amenable number.

12718784649937 is a deficient number, since it is larger than the sum of its proper divisors (1).

12718784649937 is an equidigital number, since it uses as much as digits as its factorization.

12718784649937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024192512, while the sum is 76.

The spelling of 12718784649937 in words is "twelve trillion, seven hundred eighteen billion, seven hundred eighty-four million, six hundred forty-nine thousand, nine hundred thirty-seven".