12399775965679 has 2 divisors, whose sum is σ = 12399775965680. Its totient is φ = 12399775965678.

The previous prime is 12399775965671. The next prime is 12399775965739. The reversal of 12399775965679 is 97656957799321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12399775965679 - 2³ = 12399775965671 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12399775965596 and 12399775965605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12399775965671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6199887982839 + 6199887982840.

It is an arithmetic number, because the mean of its divisors is an integer number (6199887982840).

Almost surely, 2^{12399775965679} is an apocalyptic number.

12399775965679 is a deficient number, since it is larger than the sum of its proper divisors (1).

12399775965679 is an equidigital number, since it uses as much as digits as its factorization.

12399775965679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12152284200, while the sum is 85.

The spelling of 12399775965679 in words is "twelve trillion, three hundred ninety-nine billion, seven hundred seventy-five million, nine hundred sixty-five thousand, six hundred seventy-nine".