Base | Representation |
---|---|
bin | 1110111111111101001… |
… | …0010000100101011101 |
3 | 220122010120202111120020 |
4 | 3233333102100211131 |
5 | 13210220112001234 |
6 | 314213534142353 |
7 | 24421462155153 |
oct | 3577722204535 |
9 | 818116674506 |
10 | 257686047069 |
11 | 9a314068170 |
12 | 41b366519b9 |
13 | 1b3b855a339 |
14 | c6875133d3 |
15 | 6a8299b549 |
hex | 3bff49095d |
257686047069 has 32 divisors (see below), whose sum is σ = 387847440000. Its totient is φ = 150746588160.
The previous prime is 257686046951. The next prime is 257686047077. The reversal of 257686047069 is 960740686752.
It is not a de Polignac number, because 257686047069 - 212 = 257686042973 is a prime.
It is a super-2 number, since 2×2576860470692 (a number of 24 digits) contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (257686047569) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3633057 + ... + 3703305.
It is an arithmetic number, because the mean of its divisors is an integer number (12120232500).
Almost surely, 2257686047069 is an apocalyptic number.
257686047069 is a gapful number since it is divisible by the number (29) formed by its first and last digit.
It is an amenable number.
257686047069 is a deficient number, since it is larger than the sum of its proper divisors (130161392931).
257686047069 is a wasteful number, since it uses less digits than its factorization.
257686047069 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 74125.
The product of its (nonzero) digits is 30481920, while the sum is 60.
The spelling of 257686047069 in words is "two hundred fifty-seven billion, six hundred eighty-six million, forty-seven thousand, sixty-nine".
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