Perfect Square
642827193797972401 is a perfect square (801765049 × 801765049)
642827193797972401 is a perfect square (801765049 × 801765049)
642827193797972401 is odd
Previous odd number is 642827193797972399
Next odd number is 642827193797972403
1000 1110 1011 1100 0111 1110 1101 0100 1010 0100 1010 0001 0001 1011 0001