2185544016 has 90 divisors (see below), whose sum is σ = 6171579882. Its totient is φ = 722010240.

The previous prime is 2185543993. The next prime is 2185544029. The reversal of 2185544016 is 6104455812.

It is a happy number.

2185544016 is a `hidden beast` number, since 21 + 85 + 544 + 0 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1953286416 + 232257600 = 44196^2 + 15240^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2322106 + ... + 2323046.

Almost surely, 2^2185544016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2185544016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3085789941).

2185544016 is an abundant number, since it is smaller than the sum of its proper divisors (3986035866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2185544016 is a wasteful number, since it uses less digits than its factorization.

2185544016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 2185544016 is about 46749.8023097424. The cubic root of 2185544016 is about 1297.7364982604.

Adding to 2185544016 its reverse (6104455812), we get a palindrome (8289999828).

The spelling of 2185544016 in words is "two billion, one hundred eighty-five million, five hundred forty-four thousand, sixteen".