12784655128 has 32 divisors (see below), whose sum is σ = 27499887360. Its totient is φ = 5458298400.

The previous prime is 12784655119. The next prime is 12784655141. The reversal of 12784655128 is 82155648721.

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, 419298 + ... + 448753.

It is an arithmetic number, because the mean of its divisors is an integer number (859371480).

Almost surely, 2^12784655128 is an apocalyptic number.

It is an amenable number.

12784655128 is an abundant number, since it is smaller than the sum of its proper divisors (14715232232).

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

12784655128 is a wasteful number, since it uses less digits than its factorization.

12784655128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868327 (or 868323 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The spelling of 12784655128 in words is "twelve billion, seven hundred eighty-four million, six hundred fifty-five thousand, one hundred twenty-eight".