2821823645 has 16 divisors (see below), whose sum is σ = 3441087360. Its totient is φ = 2220993600.

The previous prime is 2821823617. The next prime is 2821823663. The reversal of 2821823645 is 5463281282.

It is not a de Polignac number, because 2821823645 - 2¹⁰ = 2821822621 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166211 + ... + 182399.

It is an arithmetic number, because the mean of its divisors is an integer number (215067960).

Almost surely, 2^2821823645 is an apocalyptic number.

It is an amenable number.

2821823645 is a deficient number, since it is larger than the sum of its proper divisors (619263715).

2821823645 is a wasteful number, since it uses less digits than its factorization.

2821823645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16756.

The product of its digits is 184320, while the sum is 41.

The square root of 2821823645 is about 53120.8400253610. The cubic root of 2821823645 is about 1413.1121248011.

The spelling of 2821823645 in words is "two billion, eight hundred twenty-one million, eight hundred twenty-three thousand, six hundred forty-five".