Base | Representation |
---|---|
bin | 10111111111100000… |
… | …00011111000111001 |
3 | 1020020200100112212211 |
4 | 23333300003320321 |
5 | 202334431123023 |
6 | 5530050335121 |
7 | 634124225530 |
oct | 137760037071 |
9 | 36220315784 |
10 | 12880723513 |
11 | 550a918249 |
12 | 25b588a4a1 |
13 | 12a376c1b8 |
14 | 8a299b317 |
15 | 505c40a0d |
hex | 2ffc03e39 |
12880723513 has 16 divisors (see below), whose sum is σ = 14868357120. Its totient is φ = 10930525200.
The previous prime is 12880723501. The next prime is 12880723543. The reversal of 12880723513 is 31532708821.
It is a happy number.
It is not a de Polignac number, because 12880723513 - 229 = 12343852601 is a prime.
It is a super-2 number, since 2×128807235132 (a number of 21 digits) contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (12880723543) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259278 + ... + 304936.
It is an arithmetic number, because the mean of its divisors is an integer number (929272320).
Almost surely, 212880723513 is an apocalyptic number.
It is an amenable number.
12880723513 is a deficient number, since it is larger than the sum of its proper divisors (1987633607).
12880723513 is a wasteful number, since it uses less digits than its factorization.
12880723513 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 46068.
The product of its (nonzero) digits is 80640, while the sum is 40.
The spelling of 12880723513 in words is "twelve billion, eight hundred eighty million, seven hundred twenty-three thousand, five hundred thirteen".
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