quindecillion

number2

1. •
   (rare) 10⁴⁸.

   • 3 quindecillion, 657 quattuordecillion, 262 tredecillion; which is to say the figures 3,657,262 followed by 42 ciphers. Operators of the key punch machines transfer a code symbol from the Census …. — 1946
2. •
   (old-fashioned, rare) 10⁹⁰.