12446642399 has 2 divisors, whose sum is σ = 12446642400. Its totient is φ = 12446642398.

The previous prime is 12446642359. The next prime is 12446642471. The reversal of 12446642399 is 99324664421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12446642399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12446642359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6223321199 + 6223321200.

It is an arithmetic number, because the mean of its divisors is an integer number (6223321200).

Almost surely, 2^12446642399 is an apocalyptic number.

12446642399 is a deficient number, since it is larger than the sum of its proper divisors (1).

12446642399 is an equidigital number, since it uses as much as digits as its factorization.

12446642399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 50.

The spelling of 12446642399 in words is "twelve billion, four hundred forty-six million, six hundred forty-two thousand, three hundred ninety-nine".