1636

1636 = 2 x 2 x 409.

1636 is 11001100100 in base 2 (binary).

1636 appears inside its fourth power: 1636⁴ = 7,163,630,838,016.

1636 has a representation as a sum of two squares: 1636 = 40² + 6².

1636 is the total number of parts in all partitions of 36 into prime parts (A084993).

Source: What's Special About This Number?