1816798885 has 8 divisors (see below), whose sum is σ = 2378354976. Its totient is φ = 1321308240.

The previous prime is 1816798877. The next prime is 1816798987. The reversal of 1816798885 is 5888976181.

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

It is not a de Polignac number, because 1816798885 - 2³ = 1816798877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16516299 + ... + 16516408.

It is an arithmetic number, because the mean of its divisors is an integer number (297294372).

Almost surely, 2^1816798885 is an apocalyptic number.

It is an amenable number.

1816798885 is a deficient number, since it is larger than the sum of its proper divisors (561556091).

1816798885 is a wasteful number, since it uses less digits than its factorization.

1816798885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33032723.

The product of its digits is 7741440, while the sum is 61.

The square root of 1816798885 is about 42623.9238573832. The cubic root of 1816798885 is about 1220.2129174658.

The spelling of 1816798885 in words is "one billion, eight hundred sixteen million, seven hundred ninety-eight thousand, eight hundred eighty-five".