Big Numbers

The numbers here are quite rare. Only sahasra, meaning "one thousand," is common.

सहस्र
num
one thousand (1,000)
साहस्र
mf(ī)n
by a thousand, one thousand fold; numerous, infinite
अयुत
num
ten thousand (10,000)
लक्ष
num
hundred thousand (100,000)
प्रयुत
num
million (1,000,000)
कोटि
num
ten million (10,000,000)
अर्बुद
num
hundred million (100,000,000)
महार्बुद
num
billion (1,000,000,000)
खर्व
num
ten billion (10,000,000,000)
निखर्व
num
hundred billion (100,000,000,000)

Of the words here, lakṣa and koṭi have survived to the present day. In Hindi and English, these words have become lakh and crore. But in Indian langauges other than Hindi, they've hardly changed.