12643435464784 has 80 divisors (see below), whose sum is σ = 25340835225600. Its totient is φ = 6107926376448.

The previous prime is 12643435464767. The next prime is 12643435464811. The reversal of 12643435464784 is 48746453434621.

It is a happy number.

It is a congruent number.

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, 25411552 + ... + 25904320.

It is an arithmetic number, because the mean of its divisors is an integer number (316760440320).

Almost surely, 2^{12643435464784} is an apocalyptic number.

It is an amenable number.

12643435464784 is an abundant number, since it is smaller than the sum of its proper divisors (12697399760816).

12643435464784 is a wasteful number, since it uses less digits than its factorization.

12643435464784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493292 (or 493286 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 61.

The spelling of 12643435464784 in words is "twelve trillion, six hundred forty-three billion, four hundred thirty-five million, four hundred sixty-four thousand, seven hundred eighty-four".