12705771343609 has 2 divisors, whose sum is σ = 12705771343610. Its totient is φ = 12705771343608.

The previous prime is 12705771343553. The next prime is 12705771343633. The reversal of 12705771343609 is 90634317750721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12524499766009 + 181271577600 = 3538997^2 + 425760^2 .

It is a cyclic number.

It is not a de Polignac number, because 12705771343609 - 2⁷ = 12705771343481 is a prime.

It is a super-2 number, since 2×12705771343609² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12705771343609.

It is not a weakly prime, because it can be changed into another prime (12705771343649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352885671804 + 6352885671805.

It is an arithmetic number, because the mean of its divisors is an integer number (6352885671805).

Almost surely, 2^{12705771343609} is an apocalyptic number.

It is an amenable number.

12705771343609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705771343609 is an equidigital number, since it uses as much as digits as its factorization.

12705771343609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6667920, while the sum is 55.

The spelling of 12705771343609 in words is "twelve trillion, seven hundred five billion, seven hundred seventy-one million, three hundred forty-three thousand, six hundred nine".