1816864818 has 8 divisors (see below), whose sum is σ = 3633729648. Its totient is φ = 605621604.

The previous prime is 1816864801. The next prime is 1816864823. The reversal of 1816864818 is 8184686181.

It is a sphenic number, since it is the product of 3 distinct primes.

1816864818 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151405396 + ... + 151405407.

It is an arithmetic number, because the mean of its divisors is an integer number (454216206).

Almost surely, 2^1816864818 is an apocalyptic number.

1816864818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1816864818 is a wasteful number, since it uses less digits than its factorization.

1816864818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302810808.

The product of its digits is 589824, while the sum is 51.

The square root of 1816864818 is about 42624.6972775174. The cubic root of 1816864818 is about 1220.2276781026.

The spelling of 1816864818 in words is "one billion, eight hundred sixteen million, eight hundred sixty-four thousand, eight hundred eighteen".