12659774838 has 16 divisors (see below), whose sum is σ = 25415824896. Its totient is φ = 4203879080.

The previous prime is 12659774833. The next prime is 12659774851. The reversal of 12659774838 is 83847795621.

12659774838 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12659774833) 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, 4009758 + ... + 4012913.

It is an arithmetic number, because the mean of its divisors is an integer number (1588489056).

Almost surely, 2^12659774838 is an apocalyptic number.

12659774838 is an abundant number, since it is smaller than the sum of its proper divisors (12756050058).

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

12659774838 is a wasteful number, since it uses less digits than its factorization.

12659774838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022939.

The product of its digits is 20321280, while the sum is 60.

The spelling of 12659774838 in words is "twelve billion, six hundred fifty-nine million, seven hundred seventy-four thousand, eight hundred thirty-eight".