Q:

# What is the highest number in the world?

A:

Integers proceed upward in an infinite sequence, so no number can be said to be the "highest," as it is always possible to add one and get a higher number. Infinity is generally not regarded as a number but as a concept. The highest named number is the googolplex.

Know More

## Keep Learning

Credit: SSPL Hulton Archive Getty Images

A googol is 10^100, or a one with 100 zeros after it. This is 20 orders of magnitude higher than the estimated number of hydrogen atoms in the universe, which makes a googol difficult to use in real-world math. A googol to the googol power, a googolplex, is a one followed by 10^100 zeros. This number can be expressed as 10^10^100. If written in its entirety, however, the sheet of paper it is written on would not fit inside of the observable universe.

Sources:

## Related Questions

• A:

The largest number in the world is the googolplexian. This number starts with a 1 and has a googolplex of 0's after it.

Filed Under:
• A:

The Hindu-Arabic number system, which is the system used around the world to represent figures, permits mathematical operations to be made on arbitrarily large numbers. This place-value number system, with its use of zero, uses only 10 distinct digits to represent any number.

Filed Under:
• A:

To add decimals, first write down the numbers, one below the other, with the decimal points in line with each other. If the numbers have different numbers of digits, add zeros to shorter numbers to equalize the length. Then add from right to left using column addition.