They give off resonance waves, each one absolutely unique; there's about one chance in a quadrillion of a duplicate pattern.
At this rate of growth from a single cholera bacillus sixteen quadrillion might arise in a single day.
For the enormous majority of us there is no difference in this respect between a hundred and a quadrillion.
quadrillion, kwod-ril′yun, n. a million raised to the fourth power, represented by a unit with twenty-four ciphers.
The observatory on Pluto had reported a free planet passing within two hundred quadrillion miles of the solar system.
"Three quadrillion times, my son," replied his father with perfect accuracy and a spirit of hourly freshness.
Their velocity was six hundred and sixty quadrillion miles per second!