12691295696 has 20 divisors (see below), whose sum is σ = 25112565312. Its totient is φ = 6210633696.

The previous prime is 12691295627. The next prime is 12691295711. The reversal of 12691295696 is 69659219621.

It is a happy number.

It is a super-2 number, since 2×12691295696² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 8437610 + ... + 8439113.

Almost surely, 2^12691295696 is an apocalyptic number.

12691295696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12691295696 is a deficient number, since it is larger than the sum of its proper divisors (12421269616).

12691295696 is a wasteful number, since it uses less digits than its factorization.

12691295696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16876778 (or 16876772 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 56.

The spelling of 12691295696 in words is "twelve billion, six hundred ninety-one million, two hundred ninety-five thousand, six hundred ninety-six".