Preprocessor division giving weird value

This is driving me crazy. I have a code which is outputting a weird value while using division:

#define NANOSECONDS_PER_SECOND   1000000000
uint64 CurrentTimeInNanoSecs; 

    uint64 GetTimeInNanoSecs( )
   {
      printf("\n%X", (CurrentTimeInNanoSecs >> 32) ); 
      printf("\n%X", (CurrentTimeInNanoSecs & 0xFFFFFFFF) ); 
      return ( CurrentTimeInNanoSecs );
   }

void GetCurrentTimeInSecs()
{
  uint32 Time = GetTimeInNanoSecs() / NANOSECONDS_PER_SECOND;
  printf("%X", time);
}

void main()
{
GetCurrentTimeInSecs();
}

On init, I see the prints as follows: 0x00000000 0x3016DC6B 0x00000198

I am not sure what is happening. Can someone pls help.

Beware that printf format specifiers must agree with the datatype that is passed, otherwise data may be misinterpreted and print as gibberish!

The correct way to print a uint64_t is with printf("%" PRIu64 "\n", x);, where PRIu64 is defined in inttypes.h. Note: Pre-C11, you may need to define __STDC_FORMAT_MACROS to get PRIu64, as described in this SO post.

More generally, see the table in https://en.cppreference.com/w/cpp/io/c/fprintf of the expected types for each specifier. There's also a good printf format string article on Wikipedia about it.

I recommend compiling with warnings turned on. Use command line option -Wall, if using clang or gcc. Most compilers should give warnings on the posted code like:
format '%X' expects argument of type 'unsigned int', but argument has type 'uint64_t'