12805603839 has 24 divisors (see below), whose sum is σ = 21145413120. Its totient is φ = 7315409808.

The previous prime is 12805603801. The next prime is 12805603849. The reversal of 12805603839 is 93830650821.

It is a happy number.

12805603839 is a `hidden beast` number, since 1 + 2 + 8 + 0 + 5 + 603 + 8 + 39 = 666.

It is not a de Polignac number, because 12805603839 - 2²⁰ = 12804555263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12805603794 and 12805603803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12805603849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 210342 + ... + 264300.

It is an arithmetic number, because the mean of its divisors is an integer number (881058880).

Almost surely, 2^12805603839 is an apocalyptic number.

12805603839 is a deficient number, since it is larger than the sum of its proper divisors (8339809281).

12805603839 is a wasteful number, since it uses less digits than its factorization.

12805603839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57739 (or 57736 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 12805603839 in words is "twelve billion, eight hundred five million, six hundred three thousand, eight hundred thirty-nine".