12844350905909 has 2 divisors, whose sum is σ = 12844350905910. Its totient is φ = 12844350905908.

The previous prime is 12844350905899. The next prime is 12844350905917. The reversal of 12844350905909 is 90950905344821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12343122305284 + 501228600625 = 3513278^2 + 707975^2 .

It is a cyclic number.

It is not a de Polignac number, because 12844350905909 - 2¹² = 12844350901813 is a prime.

It is a super-2 number, since 2×12844350905909² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12844350905929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6422175452954 + 6422175452955.

It is an arithmetic number, because the mean of its divisors is an integer number (6422175452955).

Almost surely, 2^{12844350905909} is an apocalyptic number.

It is an amenable number.

12844350905909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12844350905909 is an equidigital number, since it uses as much as digits as its factorization.

12844350905909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13996800, while the sum is 59.

The spelling of 12844350905909 in words is "twelve trillion, eight hundred forty-four billion, three hundred fifty million, nine hundred five thousand, nine hundred nine".