12891426712 has 32 divisors (see below), whose sum is σ = 24354111600. Its totient is φ = 6397142400.

The previous prime is 12891426683. The next prime is 12891426721. The reversal of 12891426712 is 21762419821.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728287 + ... + 745777.

Almost surely, 2^12891426712 is an apocalyptic number.

It is an amenable number.

12891426712 is a deficient number, since it is larger than the sum of its proper divisors (11462684888).

12891426712 is a wasteful number, since it uses less digits than its factorization.

12891426712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18187 (or 18183 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The spelling of 12891426712 in words is "twelve billion, eight hundred ninety-one million, four hundred twenty-six thousand, seven hundred twelve".