12134578789 has 4 divisors (see below), whose sum is σ = 12241964556. Its totient is φ = 12027193024.

The previous prime is 12134578787. The next prime is 12134578823. The reversal of 12134578789 is 98787543121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 439237764 + 11695341025 = 20958^2 + 108145^2 .

It is a cyclic number.

It is not a de Polignac number, because 12134578789 - 2¹ = 12134578787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12134578787) 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, 53692714 + ... + 53692939.

It is an arithmetic number, because the mean of its divisors is an integer number (3060491139).

Almost surely, 2^12134578789 is an apocalyptic number.

It is an amenable number.

12134578789 is a deficient number, since it is larger than the sum of its proper divisors (107385767).

12134578789 is a wasteful number, since it uses less digits than its factorization.

12134578789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107385766.

The product of its digits is 3386880, while the sum is 55.

The spelling of 12134578789 in words is "twelve billion, one hundred thirty-four million, five hundred seventy-eight thousand, seven hundred eighty-nine".