| Base | Representation |
|---|---|
| bin | 110100101010010100… |
| … | …011000001001000001 |
| 3 | 12101221200120020202011 |
| 4 | 310222110120021001 |
| 5 | 1411300401402211 |
| 6 | 41550510052521 |
| 7 | 4041140553451 |
| oct | 645224301101 |
| 9 | 171850506664 |
| 10 | 56544559681 |
| 11 | 21a86a25665 |
| 12 | ab607aa141 |
| 13 | 54418c294c |
| 14 | 2a459b3d61 |
| 15 | 170e1e8921 |
| hex | d2a518241 |
56544559681 has 3 divisors (see below), whose sum is σ = 56544797473. Its totient is φ = 56544321890.
The previous prime is 56544559609. The next prime is 56544559697. The reversal of 56544559681 is 18695544565.
The square root of 56544559681 is 237791.
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: 18695544565 = 5 ⋅3739108913.
It is not a de Polignac number, because 56544559681 - 223 = 56536171073 is a prime.
It is a super-2 number, since 2×565445596812 (a number of 22 digits) contains 22 as substring.
It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (56344559681) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 118896 + ... + 356686.
Almost surely, 256544559681 is an apocalyptic number.
56544559681 is the 237791-st square number.
56544559681 is the 118896-th centered octagonal number.
It is an amenable number.
56544559681 is a deficient number, since it is larger than the sum of its proper divisors (237792).
56544559681 is an frugal number, since it uses more digits than its factorization.
56544559681 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 475582 (or 237791 counting only the distinct ones).
The product of its digits is 25920000, while the sum is 58.
It can be divided in two parts, 56544 and 559681, that added together give a square (616225 = 7852).
The spelling of 56544559681 in words is "fifty-six billion, five hundred forty-four million, five hundred fifty-nine thousand, six hundred eighty-one".
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