Shibly

## sum_of_digits
def sum_digits(n):
    result = 0
    while n != 0:
        result = result + (n % 10)
        n = n / 10
    return result
print sum_digits(2**50)
	def sum_digits(n):
	result = 0
	while n != 0:
	result = result + (n % 10)
	n = n / 10
	return result
	print sum_digits(2**50)