1805816216 has 16 divisors (see below), whose sum is σ = 3495128640. Its totient is φ = 873781920.

The previous prime is 1805816197. The next prime is 1805816219. The reversal of 1805816216 is 6126185081.

It is a self number, because there is not a number n which added to its sum of digits gives 1805816216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805816219) 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, 3640511 + ... + 3641006.

It is an arithmetic number, because the mean of its divisors is an integer number (218445540).

Almost surely, 2^1805816216 is an apocalyptic number.

It is an amenable number.

1805816216 is a deficient number, since it is larger than the sum of its proper divisors (1689312424).

1805816216 is a wasteful number, since it uses less digits than its factorization.

1805816216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7281554 (or 7281550 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 1805816216 is about 42494.8963523857. The cubic root of 1805816216 is about 1217.7491904770.

The spelling of 1805816216 in words is "one billion, eight hundred five million, eight hundred sixteen thousand, two hundred sixteen".