| Base | Representation |
|---|---|
| bin | 1011100101111001000101… |
| … | …01100101010010001000000 |
| 3 | 10100020221021110120020210000 |
| 4 | 11302330202230222101000 |
| 5 | 11320122001014101220 |
| 6 | 130114300202440000 |
| 7 | 5240452010465400 |
| oct | 562744254522100 |
| 9 | 110227243506700 |
| 10 | 25491213034560 |
| 11 | 8138843226889 |
| 12 | 2a3844b803000 |
| 13 | 112ba70c14920 |
| 14 | 641ad1c28800 |
| 15 | 2e3141a90390 |
| hex | 172f22b2a440 |
25491213034560 has 3360 divisors, whose sum is σ = 121149856463328. Its totient is φ = 5025371258880.
The previous prime is 25491213034517. The next prime is 25491213034561. The reversal of 25491213034560 is 6543031219452.
25491213034560 is a `hidden beast` number, since 2 + 5 + 4 + 9 + 1 + 21 + 30 + 34 + 560 = 666.
It can be written as a sum of positive squares in 16 ways, for example, as 1968790634496 + 23522422400064 = 1403136^2 + 4849992^2 .
It is a tau number, because it is divible by the number of its divisors (3360).
It is a Harshad number since it is a multiple of its sum of digits (45).
It is not an unprimeable number, because it can be changed into a prime (25491213034561) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 55295472730 + ... + 55295473190.
Almost surely, 225491213034560 is an apocalyptic number.
25491213034560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 25491213034560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60574928231664).
25491213034560 is an abundant number, since it is smaller than the sum of its proper divisors (95658643428768).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
25491213034560 is a wasteful number, since it uses less digits than its factorization.
25491213034560 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 731 (or 705 counting only the distinct ones).
The product of its (nonzero) digits is 777600, while the sum is 45.
The spelling of 25491213034560 in words is "twenty-five trillion, four hundred ninety-one billion, two hundred thirteen million, thirty-four thousand, five hundred sixty".
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