Base | Representation |
---|---|
bin | 111011111110001011… |
… | …110011111110110011 |
3 | 20011012201202202020122 |
4 | 323332023303332303 |
5 | 2023334334122012 |
6 | 45325432000455 |
7 | 4436513256332 |
oct | 737613637663 |
9 | 204181682218 |
10 | 64394051507 |
11 | 25344843a95 |
12 | 1059153012b |
13 | 60c2bb9776 |
14 | 318c29dd19 |
15 | 1a1d3b3e72 |
hex | efe2f3fb3 |
64394051507 has 2 divisors, whose sum is σ = 64394051508. Its totient is φ = 64394051506.
The previous prime is 64394051431. The next prime is 64394051509. The reversal of 64394051507 is 70515049346.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 64394051507 - 212 = 64394047411 is a prime.
Together with 64394051509, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (64394051509) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32197025753 + 32197025754.
It is an arithmetic number, because the mean of its divisors is an integer number (32197025754).
Almost surely, 264394051507 is an apocalyptic number.
64394051507 is a deficient number, since it is larger than the sum of its proper divisors (1).
64394051507 is an equidigital number, since it uses as much as digits as its factorization.
64394051507 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 453600, while the sum is 44.
The spelling of 64394051507 in words is "sixty-four billion, three hundred ninety-four million, fifty-one thousand, five hundred seven".
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