2185109168 has 80 divisors (see below), whose sum is σ = 4816834560. Its totient is φ = 951148800.

The previous prime is 2185109141. The next prime is 2185109209. The reversal of 2185109168 is 8619015812.

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, 646523 + ... + 649893.

It is an arithmetic number, because the mean of its divisors is an integer number (60210432).

Almost surely, 2^2185109168 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 2185109168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2408417280).

2185109168 is an abundant number, since it is smaller than the sum of its proper divisors (2631725392).

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

2185109168 is a wasteful number, since it uses less digits than its factorization.

2185109168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546 (or 3540 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 41.

The square root of 2185109168 is about 46745.1512779668. The cubic root of 2185109168 is about 1297.6504242597.

The spelling of 2185109168 in words is "two billion, one hundred eighty-five million, one hundred nine thousand, one hundred sixty-eight".