Hello I m trying to convert this string 0x278a51da into a integer so I can use it on the ctime from time

Question

time_in_hexa_format_as_string = '0x278a51da'
def get_time_stamp(value_for_time):
    import time
    date = time.ctime(value_for_time)
    return "Time from archive:", date

print(get_time_stamp(int(time_in_hexa_format_as_string)))

error: 
Traceback (most recent call last):
 line 103, in <module>
    print(get_time_stamp(int(time_in_hexa_format_as_string)))
ValueError: invalid literal for int() with base 10: '0x278a51da'