5561646 has 16 divisors (see below), whose sum is σ = 11228544. Its totient is φ = 1836344.

The previous prime is 5561641. The next prime is 5561657. The reversal of 5561646 is 6461655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561641) 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 7 ways as a sum of consecutive naturals, for example, 3690 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (701784).

Almost surely, 2^5561646 is an apocalyptic number.

5561646 is an abundant number, since it is smaller than the sum of its proper divisors (5666898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5561646 is a wasteful number, since it uses less digits than its factorization.

5561646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8775.

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

The square root of 5561646 is about 2358.3142284267. The cubic root of 5561646 is about 177.1744585240.

Subtracting 5561646 from its reverse (6461655), we obtain a palindrome (900009).

The spelling of 5561646 in words is "five million, five hundred sixty-one thousand, six hundred forty-six".