12645654636 has 48 divisors (see below), whose sum is σ = 29735581568. Its totient is φ = 4182624000.

The previous prime is 12645654569. The next prime is 12645654667. The reversal of 12645654636 is 63645654621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 810711 + ... + 826161.

Almost surely, 2^12645654636 is an apocalyptic number.

It is an amenable number.

12645654636 is an abundant number, since it is smaller than the sum of its proper divisors (17089926932).

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

12645654636 is a wasteful number, since it uses less digits than its factorization.

12645654636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15982 (or 15980 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 48.

The spelling of 12645654636 in words is "twelve billion, six hundred forty-five million, six hundred fifty-four thousand, six hundred thirty-six".