| Base | Representation |
|---|---|
| bin | 1100001110001110… |
| … | …11001101101000000 |
| 3 | 121221022020120221100 |
| 4 | 12013013121231000 |
| 5 | 101414312103434 |
| 6 | 3003042454400 |
| 7 | 321415435536 |
| oct | 60707315500 |
| 9 | 17838216840 |
| 10 | 6561831744 |
| 11 | 2867a8a346 |
| 12 | 1331664400 |
| 13 | 8075bc7a0 |
| 14 | 46369c156 |
| 15 | 286116699 |
| hex | 1871d9b40 |
6561831744 has 168 divisors, whose sum is σ = 20347439112. Its totient is φ = 2009825280.
The previous prime is 6561831677. The next prime is 6561831761. The reversal of 6561831744 is 4471381656.
6561831744 is a `hidden beast` number, since 6 + 561 + 83 + 1 + 7 + 4 + 4 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 831744 + 6561000000 = 912^2 + 81000^2 .
It is a self number, because there is not a number n which added to its sum of digits gives 6561831744.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1742824 + ... + 1746584.
It is an arithmetic number, because the mean of its divisors is an integer number (121115709).
Almost surely, 26561831744 is an apocalyptic number.
6561831744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 6561831744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10173719556).
6561831744 is an abundant number, since it is smaller than the sum of its proper divisors (13785607368).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6561831744 is a wasteful number, since it uses less digits than its factorization.
6561831744 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4025 (or 4012 counting only the distinct ones).
The product of its digits is 483840, while the sum is 45.
The square root of 6561831744 is about 81005.1340595150. The cubic root of 6561831744 is about 1872.1545456455.
It can be divided in two parts, 6561 and 831744, that multiplied together give a square (5457072384 = 738722).
The spelling of 6561831744 in words is "six billion, five hundred sixty-one million, eight hundred thirty-one thousand, seven hundred forty-four".
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