12786730538 has 8 divisors (see below), whose sum is σ = 20014013088. Its totient is φ = 6115392844.

The previous prime is 12786730483. The next prime is 12786730603. The reversal of 12786730538 is 83503768721.

It is a happy number.

12786730538 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138986156 + ... + 138986247.

It is an arithmetic number, because the mean of its divisors is an integer number (2501751636).

Almost surely, 2^12786730538 is an apocalyptic number.

12786730538 is a deficient number, since it is larger than the sum of its proper divisors (7227282550).

12786730538 is a wasteful number, since it uses less digits than its factorization.

12786730538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277972428.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 12786730538 in words is "twelve billion, seven hundred eighty-six million, seven hundred thirty thousand, five hundred thirty-eight".