In the system used in most of the English-speaking world today, where a billion is a thousand million, an octillion is ten to the twenty-seventh power: 1,000,000,000,000,000,000,000,000,000.
In the old British system, where a billion is a million million, an octillion is ten to the forty-eighth power.
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17 octillion
An octillion.
3.2 octillion
Oh, isn't that a lovely number, an octillion! It's quite grand, you see. In an octillion, there are 27 zeros after the 1, which means there are 1,000,000,000,000,000,000,000,000,000 in total. Just imagine all the happy little zeros playing together in harmony.
five octillion