Base | Representation |
---|---|
bin | 10111111011000111… |
… | …000011010001001001 |
3 | 2110022020001201112001 |
4 | 113323013003101021 |
5 | 410102032003324 |
6 | 15444545551001 |
7 | 1566365260216 |
oct | 277307032111 |
9 | 73266051461 |
10 | 25687766089 |
11 | a99208a957 |
12 | 4b8a945461 |
13 | 2564b812bb |
14 | 1359858b0d |
15 | a05279e44 |
hex | 5fb1c3449 |
25687766089 has 4 divisors (see below), whose sum is σ = 25690076356. Its totient is φ = 25685455824.
The previous prime is 25687766051. The next prime is 25687766101. The reversal of 25687766089 is 98066778652.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 13223160064 + 12464606025 = 114992^2 + 111645^2 .
It is a cyclic number.
It is not a de Polignac number, because 25687766089 - 29 = 25687765577 is a prime.
It is a super-2 number, since 2×256877660892 (a number of 22 digits) contains 22 as substring.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 25687766089.
It is not an unprimeable number, because it can be changed into a prime (25687766009) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138374 + ... + 1160719.
It is an arithmetic number, because the mean of its divisors is an integer number (6422519089).
Almost surely, 225687766089 is an apocalyptic number.
It is an amenable number.
25687766089 is a deficient number, since it is larger than the sum of its proper divisors (2310267).
25687766089 is a wasteful number, since it uses less digits than its factorization.
25687766089 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2310266.
The product of its (nonzero) digits is 60963840, while the sum is 64.
The spelling of 25687766089 in words is "twenty-five billion, six hundred eighty-seven million, seven hundred sixty-six thousand, eighty-nine".
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