Base | Representation |
---|---|
bin | 1110101011000… |
… | …0110100010001 |
3 | 11021210122021100 |
4 | 3222300310101 |
5 | 111223313044 |
6 | 10035015013 |
7 | 1345044501 |
oct | 352606421 |
9 | 137718240 |
10 | 61541649 |
11 | 31814174 |
12 | 1873a469 |
13 | c9998a0 |
14 | 825da01 |
15 | 5609869 |
hex | 3ab0d11 |
61541649 has 24 divisors (see below), whose sum is σ = 101365992. Its totient is φ = 35642880.
The previous prime is 61541647. The next prime is 61541651. The reversal of 61541649 is 94614516.
61541649 is a `hidden beast` number, since 6 + 1 + 5 + 4 + 1 + 649 = 666.
It is an interprime number because it is at equal distance from previous prime (61541647) and next prime (61541651).
It can be written as a sum of positive squares in 4 ways, for example, as 3294225 + 58247424 = 1815^2 + 7632^2 .
It is not a de Polignac number, because 61541649 - 21 = 61541647 is a prime.
It is not an unprimeable number, because it can be changed into a prime (61541647) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13482 + ... + 17459.
It is an arithmetic number, because the mean of its divisors is an integer number (4223583).
Almost surely, 261541649 is an apocalyptic number.
It is an amenable number.
61541649 is a deficient number, since it is larger than the sum of its proper divisors (39824343).
61541649 is a wasteful number, since it uses less digits than its factorization.
61541649 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 30977 (or 30974 counting only the distinct ones).
The product of its digits is 25920, while the sum is 36.
The square root of 61541649 is about 7844.8485645040. The cubic root of 61541649 is about 394.8114230981.
The spelling of 61541649 in words is "sixty-one million, five hundred forty-one thousand, six hundred forty-nine".
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