12128844418 has 8 divisors (see below), whose sum is σ = 18360177660. Its totient is φ = 6008785200.

The previous prime is 12128844341. The next prime is 12128844419. The reversal of 12128844418 is 81444882121.

It can be written as a sum of positive squares in 2 ways, for example, as 11886014529 + 242829889 = 109023^2 + 15583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12128844419) by changing a digit.

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, 27818233 + ... + 27818668.

Almost surely, 2^12128844418 is an apocalyptic number.

12128844418 is a deficient number, since it is larger than the sum of its proper divisors (6231333242).

12128844418 is a wasteful number, since it uses less digits than its factorization.

12128844418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55637012.

The product of its digits is 131072, while the sum is 43.

The spelling of 12128844418 in words is "twelve billion, one hundred twenty-eight million, eight hundred forty-four thousand, four hundred eighteen".