integers.info

Binary Numbers

Conversion between 645 and 1010000101

The below table visualizes how the decimal number 645 equals the binary number 1010000101.

1×29=512
+0×28=0
+1×27=128
+0×26=0
+0×25=0
+0×24=0
+0×23=0
+1×22=4
+0×21=0
+1×20=1
=645

About Binary Numbers

Binary numbers are a positional numeral system with the base (or "radix") 2. This means that binary digit (or "bit") only has two states: 1 and 0. As a result, binary numbers are well suited for electronic circuits since they can be represented as ON or OFF states, and they're therefore used as the fundamental data format in computers. A collection of 8 bits is commonly referred to as Byte. There are 28 different combinations of bits in a byte, and it can therefore be used to represent integers between 0 and 255. To represent one quadrillion (the largest number supported on integers.info), a total of 50 bits are required.