12781831783366 has 16 divisors (see below), whose sum is σ = 19713713223600. Its totient is φ = 6212806580448.

The previous prime is 12781831783327. The next prime is 12781831783403. The reversal of 12781831783366 is 66338713818721.

It is a junction number, because it is equal to n+sod(n) for n = 12781831783298 and 12781831783307.

It is a congruent number.

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, 553122936 + ... + 553146043.

It is an arithmetic number, because the mean of its divisors is an integer number (1232107076475).

Almost surely, 2^{12781831783366} is an apocalyptic number.

12781831783366 is a deficient number, since it is larger than the sum of its proper divisors (6931881440234).

12781831783366 is a wasteful number, since it uses less digits than its factorization.

12781831783366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106269143.

The product of its digits is 48771072, while the sum is 64.

The spelling of 12781831783366 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred thirty-one million, seven hundred eighty-three thousand, three hundred sixty-six".