Hi,
I think that the best will be to do a SQL query to count the number of HikaShop products.
You can do that in a module and use a JText in order to have some translated text for your multilanguage purposes.
HikaShop can display the number of products in a category while showing a product listing. If you want to display it in another context, you will have to do that in a module.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.