12584555917 has 4 divisors (see below), whose sum is σ = 12584902716. Its totient is φ = 12584209120.

The previous prime is 12584555897. The next prime is 12584555941. The reversal of 12584555917 is 71955548521.

12584555917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2339269956 + 10245285961 = 48366^2 + 101219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12584555917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12584555717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111634 + ... + 193987.

It is an arithmetic number, because the mean of its divisors is an integer number (3146225679).

Almost surely, 2^12584555917 is an apocalyptic number.

It is an amenable number.

12584555917 is a deficient number, since it is larger than the sum of its proper divisors (346799).

12584555917 is an equidigital number, since it uses as much as digits as its factorization.

12584555917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346798.

The product of its digits is 2520000, while the sum is 52.

The spelling of 12584555917 in words is "twelve billion, five hundred eighty-four million, five hundred fifty-five thousand, nine hundred seventeen".