12823584905 has 4 divisors (see below), whose sum is σ = 15388301892. Its totient is φ = 10258867920.

The previous prime is 12823584889. The next prime is 12823584967. The reversal of 12823584905 is 50948532821.

It is a happy number.

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 1420762249 + 11402822656 = 37693^2 + 106784^2 .

It is not a de Polignac number, because 12823584905 - 2⁴ = 12823584889 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 12823584905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282358486 + ... + 1282358495.

It is an arithmetic number, because the mean of its divisors is an integer number (3847075473).

Almost surely, 2^12823584905 is an apocalyptic number.

It is an amenable number.

12823584905 is a deficient number, since it is larger than the sum of its proper divisors (2564716987).

12823584905 is an equidigital number, since it uses as much as digits as its factorization.

12823584905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564716986.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 12823584905 in words is "twelve billion, eight hundred twenty-three million, five hundred eighty-four thousand, nine hundred five".