12918844361 has 2 divisors, whose sum is σ = 12918844362. Its totient is φ = 12918844360.

The previous prime is 12918844333. The next prime is 12918844369. The reversal of 12918844361 is 16344881921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11410298761 + 1508545600 = 106819^2 + 38840^2 .

It is a cyclic number.

It is not a de Polignac number, because 12918844361 - 2³⁰ = 11845102537 is a prime.

It is not a weakly prime, because it can be changed into another prime (12918844369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459422180 + 6459422181.

It is an arithmetic number, because the mean of its divisors is an integer number (6459422181).

Almost surely, 2^12918844361 is an apocalyptic number.

It is an amenable number.

12918844361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12918844361 is an equidigital number, since it uses as much as digits as its factorization.

12918844361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 47.

The spelling of 12918844361 in words is "twelve billion, nine hundred eighteen million, eight hundred forty-four thousand, three hundred sixty-one".