1866050605105 has 16 divisors (see below), whose sum is σ = 2251032036480. Its totient is φ = 1484994106368.

The previous prime is 1866050605103. The next prime is 1866050605163. The reversal of 1866050605105 is 5015060506681.

It is a cyclic number.

It is not a de Polignac number, because 1866050605105 - 2¹ = 1866050605103 is a prime.

It is a super-2 number, since 2×1866050605105² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1866050605103) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 14258356 + ... + 14388634.

It is an arithmetic number, because the mean of its divisors is an integer number (140689502280).

Almost surely, 2^{1866050605105} is an apocalyptic number.

It is an amenable number.

1866050605105 is a deficient number, since it is larger than the sum of its proper divisors (384981431375).

1866050605105 is a wasteful number, since it uses less digits than its factorization.

1866050605105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145320.

The product of its (nonzero) digits is 216000, while the sum is 43.

The spelling of 1866050605105 in words is "one trillion, eight hundred sixty-six billion, fifty million, six hundred five thousand, one hundred five".