# List of known perfect numbers (the first few)
perfect_numbers = {6, 28, 496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128}

def is_perfect_number(N):
    return N in perfect_numbers

# Example usage:
N = int(input("Enter a number: "))  # Taking input from the user
if is_perfect_number(N):
    print("Yes")
else:
    print("No")