12651239999939 has 2 divisors, whose sum is σ = 12651239999940. Its totient is φ = 12651239999938.

The previous prime is 12651239999921. The next prime is 12651240000031. The reversal of 12651239999939 is 93999993215621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12651239999939 - 2²⁴ = 12651223222723 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12651239999939.

It is not a weakly prime, because it can be changed into another prime (12651239999239) 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, 6325619999969 + 6325619999970.

It is an arithmetic number, because the mean of its divisors is an integer number (6325619999970).

Almost surely, 2^{12651239999939} is an apocalyptic number.

12651239999939 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651239999939 is an equidigital number, since it uses as much as digits as its factorization.

12651239999939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 573956280, while the sum is 77.

The spelling of 12651239999939 in words is "twelve trillion, six hundred fifty-one billion, two hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred thirty-nine".