12783581816285 has 32 divisors (see below), whose sum is σ = 17700903198720. Its totient is φ = 8681366693952.

The previous prime is 12783581816279. The next prime is 12783581816323. The reversal of 12783581816285 is 58261818538721.

It is a cyclic number.

It is not a de Polignac number, because 12783581816285 - 2⁶ = 12783581816221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12071342 + ... + 13087568.

It is an arithmetic number, because the mean of its divisors is an integer number (553153224960).

Almost surely, 2^{12783581816285} is an apocalyptic number.

It is an amenable number.

12783581816285 is a deficient number, since it is larger than the sum of its proper divisors (4917321382435).

12783581816285 is a wasteful number, since it uses less digits than its factorization.

12783581816285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019705.

The product of its digits is 51609600, while the sum is 65.

The spelling of 12783581816285 in words is "twelve trillion, seven hundred eighty-three billion, five hundred eighty-one million, eight hundred sixteen thousand, two hundred eighty-five".