According to [1], the Church is estimated to own over 170 million acres worldwide. Assuming that property is distributed evenly by land area, let's estimate that the Catholic church owns ~3.5 million acres in the United States and ~1.75 million in Europe (minus Russia). The value ranges from something like $100 million for an acre in NYC to $1,000/acre in Wyoming so even if you price each acre as Wyoming uninhabited wilderness they'd have $3.5 billion in assets. Considering how big churches, hospitals, and schools are and where they're built, I'd assume their assets average closer to $10k or $100k per acre, putting their wealth in the United States alone at $35 to 350 billion. In Europe, the numbers are probably even more skewed towards the higher end.
As long as the global average per acre is $500 or more, they've got at least a trillion in wealth. Unlike the corporation, the Church is more decentralized and structured such that most of the revenue moving through that property (donations, tithes, salaries, maintenance, etc.) doesn't show up on the books.
[1] https://archive.curbed.com/2017/10/18/16483194/catholic-chur...