12446778899 has 2 divisors, whose sum is σ = 12446778900. Its totient is φ = 12446778898.

The previous prime is 12446778889. The next prime is 12446778919. The reversal of 12446778899 is 99887764421.

12446778899 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12446778899 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (12446778829) 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, 6223389449 + 6223389450.

It is an arithmetic number, because the mean of its divisors is an integer number (6223389450).

Almost surely, 2^12446778899 is an apocalyptic number.

12446778899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12446778899 is an equidigital number, since it uses as much as digits as its factorization.

12446778899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 65.

The spelling of 12446778899 in words is "twelve billion, four hundred forty-six million, seven hundred seventy-eight thousand, eight hundred ninety-nine".