12355122615566 has 16 divisors (see below), whose sum is σ = 18558104954256. Its totient is φ = 6169089216576.

The previous prime is 12355122615457. The next prime is 12355122615581. The reversal of 12355122615566 is 66551622155321.

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 7 ways as a sum of consecutive naturals, for example, 15407210 + ... + 16189266.

It is an arithmetic number, because the mean of its divisors is an integer number (1159881559641).

Almost surely, 2^{12355122615566} is an apocalyptic number.

12355122615566 is a deficient number, since it is larger than the sum of its proper divisors (6202982338690).

12355122615566 is a wasteful number, since it uses less digits than its factorization.

12355122615566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792883.

The product of its digits is 3240000, while the sum is 50.

The spelling of 12355122615566 in words is "twelve trillion, three hundred fifty-five billion, one hundred twenty-two million, six hundred fifteen thousand, five hundred sixty-six".