| Base | Representation |
|---|---|
| bin | 1100001011101101… |
| … | …00100010000000000 |
| 3 | 121212211101000002100 |
| 4 | 12011312210100000 |
| 5 | 101343401010110 |
| 6 | 3001004350400 |
| 7 | 321040351005 |
| oct | 60566442000 |
| 9 | 17784330070 |
| 10 | 6540641280 |
| 11 | 2857026668 |
| 12 | 1326545400 |
| 13 | 8030b0554 |
| 14 | 4609438ac |
| 15 | 28432cbc0 |
| hex | 185da4400 |
6540641280 has 132 divisors (see below), whose sum is σ = 22663311372. Its totient is φ = 1744158720.
The previous prime is 6540641273. The next prime is 6540641287. The reversal of 6540641280 is 821460456.
6540641280 is a `hidden beast` number, since 6 + 5 + 4 + 0 + 641 + 2 + 8 + 0 = 666.
It is an interprime number because it is at equal distance from previous prime (6540641273) and next prime (6540641287).
It can be written as a sum of positive squares in 2 ways, for example, as 4124722176 + 2415919104 = 64224^2 + 49152^2 .
It is a Harshad number since it is a multiple of its sum of digits (36).
It is not an unprimeable number, because it can be changed into a prime (6540641287) 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 11 ways as a sum of consecutive naturals, for example, 24891 + ... + 117050.
Almost surely, 26540641280 is an apocalyptic number.
6540641280 is a gapful number since it is divisible by the number (60) 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 6540641280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11331655686).
6540641280 is an abundant number, since it is smaller than the sum of its proper divisors (16122670092).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6540641280 is a wasteful number, since it uses less digits than its factorization.
6540641280 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 141972 (or 141951 counting only the distinct ones).
The product of its (nonzero) digits is 46080, while the sum is 36.
The square root of 6540641280 is about 80874.2312482783. The cubic root of 6540641280 is about 1870.1370904291.
The spelling of 6540641280 in words is "six billion, five hundred forty million, six hundred forty-one thousand, two hundred eighty".
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