| Base | Representation |
|---|---|
| bin | 11001110000011… |
| … | …10001010010000 |
| 3 | 120001120012222200 |
| 4 | 30320032022100 |
| 5 | 420303032111 |
| 6 | 33235003200 |
| 7 | 5232343053 |
| oct | 1470161220 |
| 9 | 501505880 |
| 10 | 216064656 |
| 11 | 100a65635 |
| 12 | 60439500 |
| 13 | 359c0412 |
| 14 | 209a4a9a |
| 15 | 13e7e256 |
| hex | ce0e290 |
216064656 has 120 divisors (see below), whose sum is σ = 641833920. Its totient is φ = 67661568.
The previous prime is 216064649. The next prime is 216064657. The reversal of 216064656 is 656460612.
It is a happy number.
216064656 is a `hidden beast` number, since 2 + 1 + 6 + 0 + 646 + 5 + 6 = 666.
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a self number, because there is not a number n which added to its sum of digits gives 216064656.
It is not an unprimeable number, because it can be changed into a prime (216064657) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 429301 + ... + 429803.
It is an arithmetic number, because the mean of its divisors is an integer number (5348616).
Almost surely, 2216064656 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 216064656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320916960).
216064656 is an abundant number, since it is smaller than the sum of its proper divisors (425769264).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
216064656 is a wasteful number, since it uses less digits than its factorization.
216064656 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 693 (or 684 counting only the distinct ones).
The product of its (nonzero) digits is 51840, while the sum is 36.
The square root of 216064656 is about 14699.1379339062. The cubic root of 216064656 is about 600.0598606943.
It can be divided in two parts, 21606 and 4656, that added together give a palindrome (26262).
The spelling of 216064656 in words is "two hundred sixteen million, sixty-four thousand, six hundred fifty-six".
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