12646071655999 has 2 divisors, whose sum is σ = 12646071656000. Its totient is φ = 12646071655998.

The previous prime is 12646071655993. The next prime is 12646071656147. The reversal of 12646071655999 is 99955617064621.

It is a weak prime.

It is an emirp because it is prime and its reverse (99955617064621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12646071655999 - 2⁵ = 12646071655967 is a prime.

It is a super-2 number, since 2×12646071655999² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12646071655993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323035827999 + 6323035828000.

It is an arithmetic number, because the mean of its divisors is an integer number (6323035828000).

Almost surely, 2^{12646071655999} is an apocalyptic number.

12646071655999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12646071655999 is an equidigital number, since it uses as much as digits as its factorization.

12646071655999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 220449600, while the sum is 70.

The spelling of 12646071655999 in words is "twelve trillion, six hundred forty-six billion, seventy-one million, six hundred fifty-five thousand, nine hundred ninety-nine".