Valmiki Ramayana Kishkindha Kanda Sarga 37 Shloka 23

फलमूलेन with fruits and roots, जीवन्तः those feeding on, हिमवन्तम् Himavan, उपाश्रिताः resorted to, तेषाम् them, कोटिसहस्राणाम् thousands of crores, सहस्रम् a thousand, समवर्तत was ready.

Then monkeys residing at mount Himavan feeding on fruits and roots came in thousands of crores. (This number is called Shankha 1000,000,000,000,0, it is one digit higher than Mahapadma.)