Base | Representation |
---|---|
bin | 111011101011001111… |
… | …1010000010000110000 |
3 | 110020210011200000120000 |
4 | 1313112133100100300 |
5 | 4044424024201010 |
6 | 134512242150000 |
7 | 12154511601540 |
oct | 1672637202060 |
9 | 406704600500 |
10 | 128152568880 |
11 | 4a392869856 |
12 | 20a06052300 |
13 | c11421871b |
14 | 62b9da7320 |
15 | 3500a8b7c0 |
hex | 1dd67d0430 |
128152568880 has 400 divisors, whose sum is σ = 509285213184. Its totient is φ = 29257044480.
The previous prime is 128152568861. The next prime is 128152568897. The reversal of 128152568880 is 88865251821.
128152568880 is a `hidden beast` number, since 1 + 28 + 1 + 52 + 568 + 8 + 8 + 0 = 666.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is an unprimeable number.
It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 69989565 + ... + 69991395.
Almost surely, 2128152568880 is an apocalyptic number.
128152568880 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 128152568880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254642606592).
128152568880 is an abundant number, since it is smaller than the sum of its proper divisors (381132644304).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
128152568880 is a wasteful number, since it uses less digits than its factorization.
128152568880 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3406 (or 3391 counting only the distinct ones).
The product of its (nonzero) digits is 2457600, while the sum is 54.
The spelling of 128152568880 in words is "one hundred twenty-eight billion, one hundred fifty-two million, five hundred sixty-eight thousand, eight hundred eighty".
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