Perfect Square
642827257939177921 is a perfect square (801765089 × 801765089)
642827257939177921 is a perfect square (801765089 × 801765089)
642827257939177921 is odd
Previous odd number is 642827257939177919
Next odd number is 642827257939177923
1000 1110 1011 1100 0111 1111 1100 0011 1001 0110 0111 0011 0001 1100 0001