Undevigintillion

"But how long is a world or cycle of nature? And how many courses or cycles of nature are there in a thingy? To answer the latter question first, a thingy is a number represented by a unit followed some say by sixty-four, some by one hundred and forty, ciphers. We are not accustomed to think in such high figures. One thousand million make a billion, and a thousand billion make a trillion, a thousand trillion a quadrillion and so on, next in order coming quintillions, sextillions, septillions, octillions, nonillions, decillions, undecillions, duodecillions, tredecillions, quattuordecillions, quindecillions, sedecillions, septendecillions, duodevigintillions, undevigintillions, vigintillions. The lesser sum mentioned, the number one with sixty-four ciphers following it, would amount to ten vigintillions, while the greater sum would amount to one hundred quinquequadragintillions."