12659305705 has 8 divisors (see below), whose sum is σ = 15207385032. Its totient is φ = 10116632448.

The previous prime is 12659305679. The next prime is 12659305717. The reversal of 12659305705 is 50750395621.

It can be written as a sum of positive squares in 4 ways, for example, as 1835608336 + 10823697369 = 42844^2 + 104037^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12659305705 - 2⁷ = 12659305577 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 1346362 + ... + 1355731.

It is an arithmetic number, because the mean of its divisors is an integer number (1900923129).

Almost surely, 2^12659305705 is an apocalyptic number.

It is an amenable number.

12659305705 is a deficient number, since it is larger than the sum of its proper divisors (2548079327).

12659305705 is an equidigital number, since it uses as much as digits as its factorization.

12659305705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703035.

The product of its (nonzero) digits is 283500, while the sum is 43.

The spelling of 12659305705 in words is "twelve billion, six hundred fifty-nine million, three hundred five thousand, seven hundred five".