2821805609 has 8 divisors (see below), whose sum is σ = 3261156480. Its totient is φ = 2391513696.

The previous prime is 2821805593. The next prime is 2821805627. The reversal of 2821805609 is 9065081282.

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

It is a cyclic number.

It is not a de Polignac number, because 2821805609 - 2⁴ = 2821805593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2821835609) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2264069 + ... + 2265314.

It is an arithmetic number, because the mean of its divisors is an integer number (407644560).

Almost surely, 2^2821805609 is an apocalyptic number.

It is an amenable number.

2821805609 is a deficient number, since it is larger than the sum of its proper divisors (439350871).

2821805609 is an equidigital number, since it uses as much as digits as its factorization.

2821805609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529479.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 2821805609 is about 53120.6702612081. The cubic root of 2821805609 is about 1413.1091141069.

The spelling of 2821805609 in words is "two billion, eight hundred twenty-one million, eight hundred five thousand, six hundred nine".