Well, there's a new word for me:

A crore (/ˈkrɔər/; abbreviated cr) is a unit in the Indian numbering system equal to ten million (10,000,000; in scientific notation: 107), which is written in these regions as 1,00,00,000 with the local style of digit group separators.
As yeye_olive says, you want to avoid making your entire model load in order to calculate simple things, like the total number of rows.

This discussion might help.