12784638844 has 6 divisors (see below), whose sum is σ = 22373117984. Its totient is φ = 6392319420.

The previous prime is 12784638833. The next prime is 12784638857. The reversal of 12784638844 is 44883648721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1598079852 + ... + 1598079859.

Almost surely, 2^12784638844 is an apocalyptic number.

It is an amenable number.

12784638844 is a deficient number, since it is larger than the sum of its proper divisors (9588479140).

12784638844 is a wasteful number, since it uses less digits than its factorization.

12784638844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196159715 (or 3196159713 counting only the distinct ones).

The product of its digits is 8257536, while the sum is 55.

The spelling of 12784638844 in words is "twelve billion, seven hundred eighty-four million, six hundred thirty-eight thousand, eight hundred forty-four".