12128045538 has 16 divisors (see below), whose sum is σ = 27721247040. Its totient is φ = 3465155856.

The previous prime is 12128045533. The next prime is 12128045593. The reversal of 12128045538 is 83554082121.

12128045538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12128045496 and 12128045505.

It is not an unprimeable number, because it can be changed into a prime (12128045533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144381453 + ... + 144381536.

It is an arithmetic number, because the mean of its divisors is an integer number (1732577940).

Almost surely, 2^12128045538 is an apocalyptic number.

12128045538 is an abundant number, since it is smaller than the sum of its proper divisors (15593201502).

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

12128045538 is a wasteful number, since it uses less digits than its factorization.

12128045538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288763001.

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 12128045538 in words is "twelve billion, one hundred twenty-eight million, forty-five thousand, five hundred thirty-eight".