6561

6,561 is an odd composite number. It is composed of a single prime number multiplied by itself seven times.

What does the number 6561 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 9 divisors.

6561 is an odd composite number. It is composed of one distinct prime number multiplied by itself seven times. It has a total of nine divisors.

Prime factorization of 6561:

3⁸

(3 × 3 × 3 × 3 × 3 × 3 × 3 × 3)

See below for interesting mathematical facts about the number 6561 from the Numbermatics database.

Names of 6561

Cardinal: 6561 can be written as Six thousand, five hundred sixty-one.

Scientific notation

Scientific notation: 6.561 × 10³

Factors of 6561

Number of distinct prime factors ω(n): 1
Total number of prime factors Ω(n): 8
Sum of prime factors: 3

Divisors of 6561

Number of divisors d(n): 9
Complete list of divisors:
1 3 9 27 81 243 729 2187 6561
Sum of all divisors σ(n): 9841
Sum of proper divisors (its aliquot sum) s(n): 3280
6561 is a deficient number, because the sum of its proper divisors (3280) is less than itself. Its deficiency is 3281

Bases of 6561

Binary: 1100110100001₂
Hexadecimal: 0x19A1
Base-36: 529

Squares and roots of 6561

6561 squared (6561²) is 43046721
6561 cubed (6561³) is 282429536481
6561 is a perfect square number. Its square root is 81
The cube root of 6561 is 18.7207544077

Scales and comparisons

How big is 6561?

6,561 seconds is equal to 1 hour, 49 minutes, 21 seconds.
To count from 1 to 6,561 would take you about forty-nine minutes.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 6561 cubic inches would be around 1.6 feet tall.

Recreational maths with 6561

6561 backwards is 1656
The number of decimal digits it has is: 4
The sum of 6561's digits is 18
More coming soon!

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The information we have on file for 6561 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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