12646262399 has 2 divisors, whose sum is σ = 12646262400. Its totient is φ = 12646262398.

The previous prime is 12646262371. The next prime is 12646262417. The reversal of 12646262399 is 99326264621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12646262399 - 2¹⁶ = 12646196863 is a prime.

It is a super-2 number, since 2×12646262399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12646262329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323131199 + 6323131200.

It is an arithmetic number, because the mean of its divisors is an integer number (6323131200).

Almost surely, 2^12646262399 is an apocalyptic number.

12646262399 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646262399 is an equidigital number, since it uses as much as digits as its factorization.

12646262399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 50.

The spelling of 12646262399 in words is "twelve billion, six hundred forty-six million, two hundred sixty-two thousand, three hundred ninety-nine".