1816133089 has 4 divisors (see below), whose sum is σ = 1860429060. Its totient is φ = 1771837120.

The previous prime is 1816133071. The next prime is 1816133119. The reversal of 1816133089 is 9803316181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93219025 + 1722914064 = 9655^2 + 41508^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816133089 - 2¹¹ = 1816131041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816133689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22147924 + ... + 22148005.

It is an arithmetic number, because the mean of its divisors is an integer number (465107265).

Almost surely, 2^1816133089 is an apocalyptic number.

It is an amenable number.

1816133089 is a deficient number, since it is larger than the sum of its proper divisors (44295971).

1816133089 is an equidigital number, since it uses as much as digits as its factorization.

1816133089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44295970.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1816133089 is about 42616.1130207812. The cubic root of 1816133089 is about 1220.0638435191.

The spelling of 1816133089 in words is "one billion, eight hundred sixteen million, one hundred thirty-three thousand, eighty-nine".