Base | Representation |
---|---|
bin | 111011101000001101… |
… | …0111110110001101101 |
3 | 110020112002010212212002 |
4 | 1313100122332301231 |
5 | 4044222000113024 |
6 | 134454204422045 |
7 | 12152134500632 |
oct | 1672032766155 |
9 | 406462125762 |
10 | 128050785389 |
11 | 4a34036a36a |
12 | 20997b47925 |
13 | c0c90cc1c7 |
14 | 62aa670189 |
15 | 34e6b836ae |
hex | 1dd06bec6d |
128050785389 has 2 divisors, whose sum is σ = 128050785390. Its totient is φ = 128050785388.
The previous prime is 128050785377. The next prime is 128050785403. The reversal of 128050785389 is 983587050821.
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 119341229764 + 8709555625 = 345458^2 + 93325^2 .
It is a cyclic number.
It is not a de Polignac number, because 128050785389 - 232 = 123755818093 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (128050785349) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64025392694 + 64025392695.
It is an arithmetic number, because the mean of its divisors is an integer number (64025392695).
Almost surely, 2128050785389 is an apocalyptic number.
It is an amenable number.
128050785389 is a deficient number, since it is larger than the sum of its proper divisors (1).
128050785389 is an equidigital number, since it uses as much as digits as its factorization.
128050785389 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4838400, while the sum is 56.
The spelling of 128050785389 in words is "one hundred twenty-eight billion, fifty million, seven hundred eighty-five thousand, three hundred eighty-nine".
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