I received my cactus as a gift approximately 10 years ago. I have never known what species of cactus it is and I thought it is time to figure it out.
I am unfamiliar with cactus and I don't know if the shape of the one I have is characteristic to it's species or is mine simply odd looking. I have been browsing cactus pictures on google, looking for tall cactus with somewhat narrow base and fattening up from there. Mine looks like a bat or club to me. It has never had flowers, fruits, or offspring, which really confuses me.
There is nothing specific I know about conditions my cactus likes, like when a bigger pot is needed, what temperature range is optimal. Etc.
This is how it looks, height is 59 cm (1.93 feet):
The closest looking picture I have found so far is of Peruvian Apple cactus. But mine is darker, has narrower base, and grows alone. Species are related, I guess.