12728558188 has 12 divisors (see below), whose sum is σ = 22278367552. Its totient is φ = 6363310320.

The previous prime is 12728558177. The next prime is 12728558201. The reversal of 12728558188 is 88185582721.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212220 + ... + 265507.

Almost surely, 2^12728558188 is an apocalyptic number.

It is an amenable number.

12728558188 is a deficient number, since it is larger than the sum of its proper divisors (9549809364).

12728558188 is a wasteful number, since it uses less digits than its factorization.

12728558188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484392 (or 484390 counting only the distinct ones).

The product of its digits is 2867200, while the sum is 55.

The spelling of 12728558188 in words is "twelve billion, seven hundred twenty-eight million, five hundred fifty-eight thousand, one hundred eighty-eight".