Echinopsis tarijensis?

[GermanStar]

Just a wild guess... Any insights welcome.

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[esp_imaging]

Don't think so - it needs to have at least twice as many ribs.
Spines can be very variable (especially in length/strength) , but rib counts on fairly mature stems should be in the right ballpark.
Maybe something similar, like T. chiloensis? Or maybe not..
Maybe something totally different - Eulychnia castanea? Maybe not..

[GermanStar]

Thanks! Eulychnia castanea seems a decent fit. Stems are 10cm across, branches at base, wild spinage... Maybe. Hopefully, I'll have some bloom shots later this year.

[Edwindwianto]

I see many agaves on the background

Agave victoriae reginae? at upper right corner, next to the cactus in question
Agave potatorum? at upper left corner, behind green pots