12691889693 has 12 divisors (see below), whose sum is σ = 15405950880. Its totient is φ = 10405771992.

The previous prime is 12691889687. The next prime is 12691889713. The reversal of 12691889693 is 39698819621.

It is not a de Polignac number, because 12691889693 - 2⁴ = 12691889677 is a prime.

It is a super-3 number, since 3×12691889693³ (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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691886693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5629703 + ... + 5631956.

It is an arithmetic number, because the mean of its divisors is an integer number (1283829240).

Almost surely, 2^12691889693 is an apocalyptic number.

It is an amenable number.

12691889693 is a deficient number, since it is larger than the sum of its proper divisors (2714061187).

12691889693 is a wasteful number, since it uses less digits than its factorization.

12691889693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11261696 (or 11261689 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 62.

The spelling of 12691889693 in words is "twelve billion, six hundred ninety-one million, eight hundred eighty-nine thousand, six hundred ninety-three".