12691715922 has 12 divisors (see below), whose sum is σ = 27498717870. Its totient is φ = 4230571968.

The previous prime is 12691715887. The next prime is 12691715941. The reversal of 12691715922 is 22951719621.

It can be written as a sum of positive squares in only one way, i.e., 12687994881 + 3721041 = 112641^2 + 1929^2 .

It is a super-2 number, since 2×12691715922² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 352547647 + ... + 352547682.

Almost surely, 2^12691715922 is an apocalyptic number.

12691715922 is an abundant number, since it is smaller than the sum of its proper divisors (14807001948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12691715922 is a wasteful number, since it uses less digits than its factorization.

12691715922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705095337 (or 705095334 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The spelling of 12691715922 in words is "twelve billion, six hundred ninety-one million, seven hundred fifteen thousand, nine hundred twenty-two".