12865598605 has 16 divisors (see below), whose sum is σ = 15528572928. Its totient is φ = 10232640000.

The previous prime is 12865598563. The next prime is 12865598617. The reversal of 12865598605 is 50689556821.

It is not a de Polignac number, because 12865598605 - 2¹⁵ = 12865565837 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, 2433565 + ... + 2438845.

It is an arithmetic number, because the mean of its divisors is an integer number (970535808).

Almost surely, 2^12865598605 is an apocalyptic number.

It is an amenable number.

12865598605 is a deficient number, since it is larger than the sum of its proper divisors (2662974323).

12865598605 is a wasteful number, since it uses less digits than its factorization.

12865598605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8028.

The product of its (nonzero) digits is 5184000, while the sum is 55.

The spelling of 12865598605 in words is "twelve billion, eight hundred sixty-five million, five hundred ninety-eight thousand, six hundred five".