12696543705808 has 20 divisors (see below), whose sum is σ = 24670039267300. Its totient is φ = 6330081959424.

The previous prime is 12696543705779. The next prime is 12696543705851. The reversal of 12696543705808 is 80850734569621.

It can be written as a sum of positive squares in 2 ways, for example, as 9160985530944 + 3535558174864 = 3026712^2 + 1880308^2 .

It is a super-2 number, since 2×12696543705808² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12696543705808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136862585 + ... + 1136873752.

It is an arithmetic number, because the mean of its divisors is an integer number (1233501963365).

It is a 2-persistent number, because it is pandigital, and so is 2⋅12696543705808 = 25393087411616, but 3⋅12696543705808 = 38089631117424 is not.

Almost surely, 2^{12696543705808} is an apocalyptic number.

It is an amenable number.

12696543705808 is a deficient number, since it is larger than the sum of its proper divisors (11973495561492).

12696543705808 is a wasteful number, since it uses less digits than its factorization.

12696543705808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273736694 (or 2273736688 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 64.

The spelling of 12696543705808 in words is "twelve trillion, six hundred ninety-six billion, five hundred forty-three million, seven hundred five thousand, eight hundred eight".