12445567780109 has 2 divisors, whose sum is σ = 12445567780110. Its totient is φ = 12445567780108.

The previous prime is 12445567780039. The next prime is 12445567780127. The reversal of 12445567780109 is 90108776554421.

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., 6329863510084 + 6115704270025 = 2515922^2 + 2472995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12445567780109 is a prime.

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 (12445567788109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6222783890054 + 6222783890055.

It is an arithmetic number, because the mean of its divisors is an integer number (6222783890055).

Almost surely, 2^{12445567780109} is an apocalyptic number.

It is an amenable number.

12445567780109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12445567780109 is an equidigital number, since it uses as much as digits as its factorization.

12445567780109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16934400, while the sum is 59.

The spelling of 12445567780109 in words is "twelve trillion, four hundred forty-five billion, five hundred sixty-seven million, seven hundred eighty thousand, one hundred nine".