12455049809 has 2 divisors, whose sum is σ = 12455049810. Its totient is φ = 12455049808.

The previous prime is 12455049797. The next prime is 12455049829. The reversal of 12455049809 is 90894055421.

It is a happy number.

12455049809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10754312209 + 1700737600 = 103703^2 + 41240^2 .

It is a cyclic number.

It is not a de Polignac number, because 12455049809 - 2¹⁶ = 12454984273 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12455049829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6227524904 + 6227524905.

It is an arithmetic number, because the mean of its divisors is an integer number (6227524905).

Almost surely, 2^12455049809 is an apocalyptic number.

It is an amenable number.

12455049809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12455049809 is an equidigital number, since it uses as much as digits as its factorization.

12455049809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 12455049809 in words is "twelve billion, four hundred fifty-five million, forty-nine thousand, eight hundred nine".