1242166533255 has 12 divisors (see below), whose sum is σ = 2153088657720. Its totient is φ = 662488817712.

The previous prime is 1242166533229. The next prime is 1242166533263. The reversal of 1242166533255 is 5523356612421.

1242166533255 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 1 + 66 + 533 + 2 + 55 = 666.

It is not a de Polignac number, because 1242166533255 - 2¹⁶ = 1242166467719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 27603700739 = 1242166533255 / (1 + 2 + 4 + 2 + 1 + 6 + 6 + 5 + 3 + 3 + 2 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1242166533255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13801850325 + ... + 13801850414.

It is an arithmetic number, because the mean of its divisors is an integer number (179424054810).

Almost surely, 2^{1242166533255} is an apocalyptic number.

1242166533255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1242166533255 is a deficient number, since it is larger than the sum of its proper divisors (910922124465).

1242166533255 is a wasteful number, since it uses less digits than its factorization.

1242166533255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27603700750 (or 27603700747 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The spelling of 1242166533255 in words is "one trillion, two hundred forty-two billion, one hundred sixty-six million, five hundred thirty-three thousand, two hundred fifty-five".