1816546818186 has 12 divisors (see below), whose sum is σ = 3935851439442. Its totient is φ = 605515606056.

The previous prime is 1816546818173. The next prime is 1816546818209. The reversal of 1816546818186 is 6818186456181.

It is a happy number.

1816546818186 is a `hidden beast` number, since 1 + 8 + 1 + 6 + 546 + 8 + 1 + 8 + 1 + 86 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1784011677561 + 32535140625 = 1335669^2 + 180375^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

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 5 ways as a sum of consecutive naturals, for example, 50459633821 + ... + 50459633856.

Almost surely, 2^{1816546818186} is an apocalyptic number.

1816546818186 is an abundant number, since it is smaller than the sum of its proper divisors (2119304621256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816546818186 is a wasteful number, since it uses less digits than its factorization.

1816546818186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100919267685 (or 100919267682 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 63.

The spelling of 1816546818186 in words is "one trillion, eight hundred sixteen billion, five hundred forty-six million, eight hundred eighteen thousand, one hundred eighty-six".