12385686689 has 2 divisors, whose sum is σ = 12385686690. Its totient is φ = 12385686688.

The previous prime is 12385686673. The next prime is 12385686743. The reversal of 12385686689 is 98668658321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11606830225 + 778856464 = 107735^2 + 27908^2 .

It is a cyclic number.

It is not a de Polignac number, because 12385686689 - 2⁴ = 12385686673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12385686289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6192843344 + 6192843345.

It is an arithmetic number, because the mean of its divisors is an integer number (6192843345).

Almost surely, 2^12385686689 is an apocalyptic number.

It is an amenable number.

12385686689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12385686689 is an equidigital number, since it uses as much as digits as its factorization.

12385686689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29859840, while the sum is 62.

The spelling of 12385686689 in words is "twelve billion, three hundred eighty-five million, six hundred eighty-six thousand, six hundred eighty-nine".