Decimal to hex for int64 in c

Question

Why this code does not work ?

#include <iostream>
#include <cstdio>
int main() {
  printf("%X", 1327644190303473294);
}

I am getting o/p 5f264e8e

but expected o/p is 126cbd5b5f264e8e as given by below php script

<?php
  echo dechex(1327644190303473294);
?>

Answer 1

format '%X' expects type 'unsigned int', but argument 2 has type 'long int'

#include <stdio.h>

int main(void) {
    printf("%lX",1327644190303473294);
    return 0;
}

outputs

126CBD5B5F264E8E