Base | Representation |
---|---|
bin | 1000001101110111110111… |
… | …01110101110100000000000 |
3 | 2100222100212121220120002000 |
4 | 10012323323232232200000 |
5 | 4332020004034333110 |
6 | 102232415011224000 |
7 | 3543301042664100 |
oct | 406737356564000 |
9 | 70870777816060 |
10 | 18068855777280 |
11 | 5836a60039910 |
12 | 2039a472a8000 |
13 | a10b69101759 |
14 | 466774453200 |
15 | 21502bcea1c0 |
hex | 106efbbae800 |
18068855777280 has 4608 divisors, whose sum is σ = 87363686592000. Its totient is φ = 3495910440960.
The previous prime is 18068855777239. The next prime is 18068855777299. The reversal of 18068855777280 is 8277755886081.
18068855777280 is a `hidden beast` number, since 1 + 8 + 0 + 68 + 8 + 557 + 7 + 7 + 2 + 8 + 0 = 666.
It is a tau number, because it is divible by the number of its divisors (4608).
It is a Harshad number since it is a multiple of its sum of digits (72).
It is a junction number, because it is equal to n+sod(n) for n = 18068855777199 and 18068855777208.
It is an unprimeable number.
It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 159901378504 + ... + 159901378616.
It is an arithmetic number, because the mean of its divisors is an integer number (18959133375).
Almost surely, 218068855777280 is an apocalyptic number.
18068855777280 is a gapful number since it is divisible by the number (10) 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 18068855777280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43681843296000).
18068855777280 is an abundant number, since it is smaller than the sum of its proper divisors (69294830814720).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
18068855777280 is a wasteful number, since it uses less digits than its factorization.
18068855777280 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 240 (or 207 counting only the distinct ones).
The product of its (nonzero) digits is 421478400, while the sum is 72.
The spelling of 18068855777280 in words is "eighteen trillion, sixty-eight billion, eight hundred fifty-five million, seven hundred seventy-seven thousand, two hundred eighty".
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