12691356004843 has 2 divisors, whose sum is σ = 12691356004844. Its totient is φ = 12691356004842.

The previous prime is 12691356004763. The next prime is 12691356004867. The reversal of 12691356004843 is 34840065319621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12691356004843 is a prime.

It is a super-2 number, since 2×12691356004843² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12691356064843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6345678002421 + 6345678002422.

It is an arithmetic number, because the mean of its divisors is an integer number (6345678002422).

Almost surely, 2^{12691356004843} is an apocalyptic number.

12691356004843 is a deficient number, since it is larger than the sum of its proper divisors (1).

12691356004843 is an equidigital number, since it uses as much as digits as its factorization.

12691356004843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 12691356004843 in words is "twelve trillion, six hundred ninety-one billion, three hundred fifty-six million, four thousand, eight hundred forty-three".