Perfect Square
6409390983925011788327303588926345268158328161 is a perfect square (80058672134410347015631 × 80058672134410347015631)
6409390983925011788327303588926345268158328161 is a perfect square (80058672134410347015631 × 80058672134410347015631)
6409390983925011788327303588926345268158328161 is odd
Previous odd number is 6409390983925011788327303588926345268158328159
Next odd number is 6409390983925011788327303588926345268158328163
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