12878362805 has 16 divisors (see below), whose sum is σ = 19267369344. Its totient is φ = 8028070080.

The previous prime is 12878362799. The next prime is 12878362813. The reversal of 12878362805 is 50826387821.

It is a happy number.

It is not a de Polignac number, because 12878362805 - 2⁴ = 12878362789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16724762 + ... + 16725531.

It is an arithmetic number, because the mean of its divisors is an integer number (1204210584).

Almost surely, 2^12878362805 is an apocalyptic number.

It is an amenable number.

12878362805 is a deficient number, since it is larger than the sum of its proper divisors (6389006539).

12878362805 is a wasteful number, since it uses less digits than its factorization.

12878362805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33450316.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 12878362805 in words is "twelve billion, eight hundred seventy-eight million, three hundred sixty-two thousand, eight hundred five".