Possibly a Pilosocereus species - P. calcisaxicolus?

It does resemble P. calcisaxicolus quite a bit! Thank you very much!

My guess would be some sort of Echinopsis;). Can’t help with the species, but I do know it’s not a Pilocereus;).

Its one of the Echinopsis tercsheckii/candicans group(thick stems, dense spines).

Its not a pilosocererus.Its not glauscent and its not hairy with red spines....

Another alternative could be saguaro(C.gigantea ) or pachycereus pringlei, but less likely.

Very nice plant. I would suggest repotting in a fast draining cactus mix and get it as much light as possible every day.