12128734245 has 32 divisors (see below), whose sum is σ = 19539342720. Its totient is φ = 6424346880.

The previous prime is 12128734243. The next prime is 12128734297. The reversal of 12128734245 is 54243782121.

It is a happy number.

It is not a de Polignac number, because 12128734245 - 2¹ = 12128734243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12128734243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1441942 + ... + 1450328.

It is an arithmetic number, because the mean of its divisors is an integer number (610604460).

Almost surely, 2^12128734245 is an apocalyptic number.

12128734245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12128734245 is a deficient number, since it is larger than the sum of its proper divisors (7410608475).

12128734245 is a wasteful number, since it uses less digits than its factorization.

12128734245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045.

The product of its digits is 107520, while the sum is 39.

The spelling of 12128734245 in words is "twelve billion, one hundred twenty-eight million, seven hundred thirty-four thousand, two hundred forty-five".