5646561 has 16 divisors (see below), whose sum is σ = 7983360. Its totient is φ = 3543680.

The previous prime is 5646551. The next prime is 5646577. The reversal of 5646561 is 1656465.

It is a cyclic number.

It is not a de Polignac number, because 5646561 - 2⁹ = 5646049 is a prime.

It is a super-2 number, since 2×5646561² = 63767302253442, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (5646521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2776 + ... + 4358.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^5646561 is an apocalyptic number.

It is an amenable number.

5646561 is a deficient number, since it is larger than the sum of its proper divisors (2336799).

5646561 is a wasteful number, since it uses less digits than its factorization.

5646561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656.

The product of its digits is 21600, while the sum is 33.

The square root of 5646561 is about 2376.2493556022. The cubic root of 5646561 is about 178.0716056644.

The spelling of 5646561 in words is "five million, six hundred forty-six thousand, five hundred sixty-one".