Base | Representation |
---|---|
bin | 100001011100010… |
… | …110110100001100 |
3 | 1110002202220021110 |
4 | 201130112310030 |
5 | 2122114102422 |
6 | 131401532020 |
7 | 16622054310 |
oct | 4134266414 |
9 | 1402686243 |
10 | 561081612 |
11 | 268796a13 |
12 | 137aa4010 |
13 | 8c320470 |
14 | 54735b40 |
15 | 343d160c |
hex | 21716d0c |
561081612 has 96 divisors (see below), whose sum is σ = 1625928192. Its totient is φ = 146635776.
The previous prime is 561081581. The next prime is 561081623. The reversal of 561081612 is 216180165.
It is a self number, because there is not a number n which added to its sum of digits gives 561081612.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121123 + ... + 125669.
It is an arithmetic number, because the mean of its divisors is an integer number (16936752).
Almost surely, 2561081612 is an apocalyptic number.
561081612 is a gapful number since it is divisible by the number (52) 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 561081612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812964096).
561081612 is an abundant number, since it is smaller than the sum of its proper divisors (1064846580).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
561081612 is a wasteful number, since it uses less digits than its factorization.
561081612 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4687 (or 4685 counting only the distinct ones).
The product of its (nonzero) digits is 2880, while the sum is 30.
The square root of 561081612 is about 23687.1613326713. The cubic root of 561081612 is about 824.7873891062.
The spelling of 561081612 in words is "five hundred sixty-one million, eighty-one thousand, six hundred twelve".
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