12784653965 has 8 divisors (see below), whose sum is σ = 15342925560. Its totient is φ = 10226829312.

The previous prime is 12784653949. The next prime is 12784653971. The reversal of 12784653965 is 56935648721.

12784653965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2316484 + 12782337481 = 1522^2 + 113059^2 .

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 12784653965 - 2⁴ = 12784653949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12784653965.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 45200 + ... + 166169.

It is an arithmetic number, because the mean of its divisors is an integer number (1917865695).

Almost surely, 2^12784653965 is an apocalyptic number.

It is an amenable number.

12784653965 is a deficient number, since it is larger than the sum of its proper divisors (2558271595).

12784653965 is a wasteful number, since it uses less digits than its factorization.

12784653965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223471.

The product of its digits is 10886400, while the sum is 56.

The spelling of 12784653965 in words is "twelve billion, seven hundred eighty-four million, six hundred fifty-three thousand, nine hundred sixty-five".