12843187985 has 8 divisors (see below), whose sum is σ = 15446617920. Its totient is φ = 10251355504.

The previous prime is 12843187963. The next prime is 12843188009. The reversal of 12843187985 is 58978134821.

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 12843187985 - 2¹² = 12843183889 is a prime.

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 12843187985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2896925 + ... + 2901354.

It is an arithmetic number, because the mean of its divisors is an integer number (1930827240).

Almost surely, 2^12843187985 is an apocalyptic number.

It is an amenable number.

12843187985 is a deficient number, since it is larger than the sum of its proper divisors (2603429935).

12843187985 is an equidigital number, since it uses as much as digits as its factorization.

12843187985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5798727.

The product of its digits is 3870720, while the sum is 56.

The spelling of 12843187985 in words is "twelve billion, eight hundred forty-three million, one hundred eighty-seven thousand, nine hundred eighty-five".