12816782812 has 18 divisors (see below), whose sum is σ = 23229472448. Its totient is φ = 6187410768.

The previous prime is 12816782809. The next prime is 12816782833. The reversal of 12816782812 is 21828761821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1901628 + ... + 1908355.

Almost surely, 2^12816782812 is an apocalyptic number.

It is an amenable number.

12816782812 is a deficient number, since it is larger than the sum of its proper divisors (10412689636).

12816782812 is a wasteful number, since it uses less digits than its factorization.

12816782812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810045 (or 3810014 counting only the distinct ones).

The product of its digits is 172032, while the sum is 46.

The spelling of 12816782812 in words is "twelve billion, eight hundred sixteen million, seven hundred eighty-two thousand, eight hundred twelve".