12691165589 has 4 divisors (see below), whose sum is σ = 12691463820. Its totient is φ = 12690867360.

The previous prime is 12691165583. The next prime is 12691165673. The reversal of 12691165589 is 98556119621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7989320689 + 4701844900 = 89383^2 + 68570^2 .

It is a cyclic number.

It is not a de Polignac number, because 12691165589 - 2¹⁶ = 12691100053 is a prime.

It is a super-3 number, since 3×12691165589³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12691165589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691165583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71984 + ... + 174825.

It is an arithmetic number, because the mean of its divisors is an integer number (3172865955).

Almost surely, 2^12691165589 is an apocalyptic number.

It is an amenable number.

12691165589 is a deficient number, since it is larger than the sum of its proper divisors (298231).

12691165589 is an equidigital number, since it uses as much as digits as its factorization.

12691165589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298230.

The product of its digits is 1166400, while the sum is 53.

The spelling of 12691165589 in words is "twelve billion, six hundred ninety-one million, one hundred sixty-five thousand, five hundred eighty-nine".