12691284195017 has 2 divisors, whose sum is σ = 12691284195018. Its totient is φ = 12691284195016.

The previous prime is 12691284195011. The next prime is 12691284195089. The reversal of 12691284195017 is 71059148219621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11918623856896 + 772660338121 = 3452336^2 + 879011^2 .

It is a cyclic number.

It is not a de Polignac number, because 12691284195017 - 2¹⁰ = 12691284193993 is a prime.

It is a super-2 number, since 2×12691284195017² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12691284195011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6345642097508 + 6345642097509.

It is an arithmetic number, because the mean of its divisors is an integer number (6345642097509).

Almost surely, 2^{12691284195017} is an apocalyptic number.

It is an amenable number.

12691284195017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12691284195017 is an equidigital number, since it uses as much as digits as its factorization.

12691284195017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 12691284195017 in words is "twelve trillion, six hundred ninety-one billion, two hundred eighty-four million, one hundred ninety-five thousand, seventeen".