How many cats are in the whole world that alive?

Unfortunately, there's no accurate way to know the exact number of cats in the world. Here's why:

* No Global Cat Census: There isn't a global organization that tracks cat populations.

* Varied Definitions: "Cat" can mean different things: pet cats, feral cats, wild cats (like lions and tigers).

* Constant Change: Cat populations are always fluctuating due to births, deaths, and changes in pet ownership.

Estimates:

While we can't get a precise number, some organizations have made estimations based on available data:

* The World Small Animal Veterinary Association (WSAVA) estimated in 2017 that there were around 600 million pet cats worldwide. This was based on extrapolated data from specific countries.

* Other estimates suggest that the total number of cats, including feral and wild cats, could be significantly higher than 600 million.

In Conclusion:

While we don't have a concrete answer, we can safely say there are hundreds of millions, if not billions, of cats living around the world.