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The Number 1640: Properties and Meanings
Prime Factors of 1640=2x2x2x5x41.1640 = 2222 in base 9.
The Year 1640 AD
In the year 1640 AD ...0 - 500 | 501 - 1000 | 1001 - 1500 | 1501 - 2000 | 2001 - 2500
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