12918774689 has 2 divisors, whose sum is σ = 12918774690. Its totient is φ = 12918774688.

The previous prime is 12918774679. The next prime is 12918774749. The reversal of 12918774689 is 98647781921.

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., 7703046289 + 5215728400 = 87767^2 + 72220^2 .

It is a cyclic number.

It is not a de Polignac number, because 12918774689 - 2¹² = 12918770593 is a prime.

It is not a weakly prime, because it can be changed into another prime (12918774629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459387344 + 6459387345.

It is an arithmetic number, because the mean of its divisors is an integer number (6459387345).

Almost surely, 2^12918774689 is an apocalyptic number.

It is an amenable number.

12918774689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12918774689 is an equidigital number, since it uses as much as digits as its factorization.

12918774689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 62.

The spelling of 12918774689 in words is "twelve billion, nine hundred eighteen million, seven hundred seventy-four thousand, six hundred eighty-nine".