Base | Representation |
---|---|
bin | 1001101110111… |
… | …00100010000100 |
3 | 12200121221000222 |
4 | 10313130202010 |
5 | 131400044102 |
6 | 12033523512 |
7 | 2010650066 |
oct | 467344204 |
9 | 180557028 |
10 | 81643652 |
11 | 420a40a2 |
12 | 23413598 |
13 | 13bb756c |
14 | abb3736 |
15 | 727aaa2 |
hex | 4ddc884 |
81643652 has 24 divisors (see below), whose sum is σ = 149688000. Its totient is φ = 38890016.
The previous prime is 81643651. The next prime is 81643657. The reversal of 81643652 is 25634618.
It is not an unprimeable number, because it can be changed into a prime (81643651) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23099 + ... + 26397.
It is an arithmetic number, because the mean of its divisors is an integer number (6237000).
Almost surely, 281643652 is an apocalyptic number.
It is an amenable number.
81643652 is a deficient number, since it is larger than the sum of its proper divisors (68044348).
81643652 is a wasteful number, since it uses less digits than its factorization.
81643652 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3595 (or 3593 counting only the distinct ones).
The product of its digits is 34560, while the sum is 35.
The square root of 81643652 is about 9035.6876882725. The cubic root of 81643652 is about 433.8179065782.
The spelling of 81643652 in words is "eighty-one million, six hundred forty-three thousand, six hundred fifty-two".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.001 sec. • engine limits •