12865379543999 has 2 divisors, whose sum is σ = 12865379544000. Its totient is φ = 12865379543998.

The previous prime is 12865379543927. The next prime is 12865379544001. The reversal of 12865379543999 is 99934597356821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12865379543999 is a prime.

It is a super-2 number, since 2×12865379543999² (a number of 27 digits) contains 22 as substring.

Together with 12865379544001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12865379543699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6432689771999 + 6432689772000.

It is an arithmetic number, because the mean of its divisors is an integer number (6432689772000).

Almost surely, 2^{12865379543999} is an apocalyptic number.

12865379543999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12865379543999 is an equidigital number, since it uses as much as digits as its factorization.

12865379543999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3968092800, while the sum is 80.

The spelling of 12865379543999 in words is "twelve trillion, eight hundred sixty-five billion, three hundred seventy-nine million, five hundred forty-three thousand, nine hundred ninety-nine".