| Base | Representation |
|---|---|
| bin | 100010111100000001… |
| … | …0010111110000110001 |
| 3 | 21011122212001011001011 |
| 4 | 1011320002113300301 |
| 5 | 2212124223102234 |
| 6 | 54244553310521 |
| 7 | 5264162203312 |
| oct | 1057002276061 |
| 9 | 234585034034 |
| 10 | 75028331569 |
| 11 | 2990159aaa4 |
| 12 | 1265aa05441 |
| 13 | 70c9115989 |
| 14 | 38ba770609 |
| 15 | 1e41cb1b64 |
| hex | 1178097c31 |
75028331569 has 3 divisors (see below), whose sum is σ = 75028605483. Its totient is φ = 75028057656.
The previous prime is 75028331561. The next prime is 75028331597. The reversal of 75028331569 is 96513382057.
The square root of 75028331569 is 273913.
It is a perfect power (a square), and thus also a powerful number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96513382057 = 467 ⋅206666771.
It can be written as a sum of positive squares in only one way, i.e., 11669400625 + 63358930944 = 108025^2 + 251712^2 .
It is not a de Polignac number, because 75028331569 - 23 = 75028331561 is a prime.
It is a super-2 number, since 2×750283315692 (a number of 23 digits) contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (75028331561) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 136957 + ... + 410869.
It is an arithmetic number, because the mean of its divisors is an integer number (25009535161).
Almost surely, 275028331569 is an apocalyptic number.
75028331569 is the 273913-rd square number.
75028331569 is the 136957-th centered octagonal number.
It is an amenable number.
75028331569 is a deficient number, since it is larger than the sum of its proper divisors (273914).
75028331569 is an frugal number, since it uses more digits than its factorization.
75028331569 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 547826 (or 273913 counting only the distinct ones).
The product of its (nonzero) digits is 1360800, while the sum is 49.
Multiplying 75028331569 by its sum of digits (49), we get a square (3676388246881 = 19173912).
The spelling of 75028331569 in words is "seventy-five billion, twenty-eight million, three hundred thirty-one thousand, five hundred sixty-nine".
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