640

Number
$640$ (six hundred and forty) is:
 * $2^7 \times 5$


 * The $11$th positive integer after $128$, $192$, $256$, $320$, $384$, $432$, $448$, $480$, $512$, $576$ with $7$ or more prime factors:
 * $640 = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \left({\times \, 5}\right)$