12859326565 has 32 divisors (see below), whose sum is σ = 16297687296. Its totient is φ = 9721113600.

The previous prime is 12859326523. The next prime is 12859326581. The reversal of 12859326565 is 56562395821.

It is a happy number.

It is not a de Polignac number, because 12859326565 - 2¹⁷ = 12859195493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6886762 + ... + 6888628.

It is an arithmetic number, because the mean of its divisors is an integer number (509302728).

Almost surely, 2^12859326565 is an apocalyptic number.

It is an amenable number.

12859326565 is a deficient number, since it is larger than the sum of its proper divisors (3438360731).

12859326565 is a wasteful number, since it uses less digits than its factorization.

12859326565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589.

The product of its digits is 3888000, while the sum is 52.

The spelling of 12859326565 in words is "twelve billion, eight hundred fifty-nine million, three hundred twenty-six thousand, five hundred sixty-five".