12635845805 has 16 divisors (see below), whose sum is σ = 16853577984. Its totient is φ = 9016313280.

The previous prime is 12635845769. The next prime is 12635845811. The reversal of 12635845805 is 50854853621.

It is not a de Polignac number, because 12635845805 - 2¹² = 12635841709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12635845805.

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 15 ways as a sum of consecutive naturals, for example, 2164469 + ... + 2170298.

It is an arithmetic number, because the mean of its divisors is an integer number (1053348624).

Almost surely, 2^12635845805 is an apocalyptic number.

It is an amenable number.

12635845805 is a deficient number, since it is larger than the sum of its proper divisors (4217732179).

12635845805 is a wasteful number, since it uses less digits than its factorization.

12635845805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334836.

The product of its (nonzero) digits is 1152000, while the sum is 47.

The spelling of 12635845805 in words is "twelve billion, six hundred thirty-five million, eight hundred forty-five thousand, eight hundred five".