The Number

81664

Eighty-One Thousand Six Hundred and Sixty-Four

In Base 11 Undecimal Is

563a011

The numbers with a 11 subscript use Base 11 Undecimal notation.

For more familiar numbers: See Eighty-One Thousand Six Hundred and Sixty-Four in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

81661
5639811
Eighty-One Thousand Six Hundred and Sixty-One in Base 11 Undecimal
81662
5639911
Eighty-One Thousand Six Hundred and Sixty-Two in Base 11 Undecimal
81663
5639a11
Eighty-One Thousand Six Hundred and Sixty-Three in Base 11 Undecimal
81665
563a111
Eighty-One Thousand Six Hundred and Sixty-Five in Base 11 Undecimal
81666
563a211
Eighty-One Thousand Six Hundred and Sixty-Six in Base 11 Undecimal
81667
563a311
Eighty-One Thousand Six Hundred and Sixty-Seven in Base 11 Undecimal

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

8.1664e4

Reciprocal

A number multiplied with its reciprocal is one.

0.00001a76985412962aa111

The reciprocal of 81664 in Base 11 Undecimal.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 563a011 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Eighty-one thousand six hundred and sixty-four is a composite number with 36 total factors (including 1 and itself).   See primes in Base 11 Undecimal

A Composite

Composites have more than just these two factors.

Eighty-one thousand six hundred and sixty-four is a composite number with 36 total factors (including 1 and itself).

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number eighty-one thousand six hundred and sixty-four has the following 3 prime factors:

2
211
Two in Base 11 Undecimal
11
1011
Eleven in Base 11 Undecimal
29
2711
Twenty-Nine in Base 11 Undecimal

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

2118 · 10111 · 27111 = 563a011

Base Conversions

The number eighty-one thousand six hundred and sixty-four in 35 different bases