Why are two different hexadecimal numbers converted to the same binary?

Question

hex

I have two hexadecimal numbers:
bebb8568a63b1818
bebb8568a63b1800
Each of them I translated to binary:
1011111010111011100001010110100010100110001110110001100000000000
1011111010111011100001010110100010100110001110110001100000000000
As you can see, the two binary numbers are identical.
Why?

Answer 1

Is this the first time you hear that numbers in PC cannot exceed a certain value unless long arithmetic is used?
signed char: -127 to 127 (note, not -128 to 127; this accommodates 1's-complement platforms)
unsigned char: 0 to 255
"plain" char: -127 to 127 or 0 to 255 (depends on default char signedness)
signed short: -32767 to 32767
unsigned short: 0 to 65535
signed int: -32767 to 32767
unsigned int: 0 to 65535
signed long: -2147483647 to 2147483647
unsigned long: 0 to 4294967295
signed long long: -9223372036854775807 to 9223372036854775807
unsigned long long: 0 to 18446744073709551615

Answer 2

Thanks to all. I realized that this is due to the fact that the binary number is very long and does not fit in an int.