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22 hours ago · Astronomy – Stars: 70 sextillion = 7 × 10 22, the estimated number of stars within range of telescopes (as of 2003). Astronomy – Stars: in the range of 10 23 to 10 24 stars in the observable universe. Mathematics: 146,361,946,186,458,562,560,000 (≈1.5 × 10 23) is the fifth unitary perfect number.
