12447833665 has 4 divisors (see below), whose sum is σ = 14937400404. Its totient is φ = 9958266928.

The previous prime is 12447833663. The next prime is 12447833677. The reversal of 12447833665 is 56633874421.

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 4010308929 + 8437524736 = 63327^2 + 91856^2 .

It is a cyclic number.

It is not a de Polignac number, because 12447833665 - 2¹ = 12447833663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12447833663) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1244783362 + ... + 1244783371.

It is an arithmetic number, because the mean of its divisors is an integer number (3734350101).

Almost surely, 2^12447833665 is an apocalyptic number.

It is an amenable number.

12447833665 is a deficient number, since it is larger than the sum of its proper divisors (2489566739).

12447833665 is an equidigital number, since it uses as much as digits as its factorization.

12447833665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2489566738.

The product of its digits is 2903040, while the sum is 49.

The spelling of 12447833665 in words is "twelve billion, four hundred forty-seven million, eight hundred thirty-three thousand, six hundred sixty-five".