12391783789 has 16 divisors (see below), whose sum is σ = 15826317696. Its totient is φ = 9420422400.

The previous prime is 12391783783. The next prime is 12391783819. The reversal of 12391783789 is 98738719321.

It is not a de Polignac number, because 12391783789 - 2⁵ = 12391783757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12391783783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1959432 + ... + 1965745.

It is an arithmetic number, because the mean of its divisors is an integer number (989144856).

Almost surely, 2^12391783789 is an apocalyptic number.

It is an amenable number.

12391783789 is a deficient number, since it is larger than the sum of its proper divisors (3434533907).

12391783789 is a wasteful number, since it uses less digits than its factorization.

12391783789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3925236.

The product of its digits is 4572288, while the sum is 58.

The spelling of 12391783789 in words is "twelve billion, three hundred ninety-one million, seven hundred eighty-three thousand, seven hundred eighty-nine".