12128835394 has 16 divisors (see below), whose sum is σ = 20122269048. Its totient is φ = 5446628352.

The previous prime is 12128835391. The next prime is 12128835409. The reversal of 12128835394 is 49353882121.

It can be written as a sum of positive squares in 4 ways, for example, as 11612864169 + 515971225 = 107763^2 + 22715^2 .

It is not an unprimeable number, because it can be changed into a prime (12128835391) 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 7 ways as a sum of consecutive naturals, for example, 6303007 + ... + 6304930.

Almost surely, 2^12128835394 is an apocalyptic number.

12128835394 is a deficient number, since it is larger than the sum of its proper divisors (7993433654).

12128835394 is a wasteful number, since it uses less digits than its factorization.

12128835394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12607989.

The product of its digits is 414720, while the sum is 46.

The spelling of 12128835394 in words is "twelve billion, one hundred twenty-eight million, eight hundred thirty-five thousand, three hundred ninety-four".