5655561 has 8 divisors (see below), whose sum is σ = 7744704. Its totient is φ = 3668400.

The previous prime is 5655541. The next prime is 5655569. The reversal of 5655561 is 1655565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5655561 - 2⁹ = 5655049 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5655569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25365 + ... + 25586.

It is an arithmetic number, because the mean of its divisors is an integer number (968088).

Almost surely, 2^5655561 is an apocalyptic number.

It is an amenable number.

5655561 is a deficient number, since it is larger than the sum of its proper divisors (2089143).

5655561 is a wasteful number, since it uses less digits than its factorization.

5655561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50991.

The product of its digits is 22500, while the sum is 33.

The square root of 5655561 is about 2378.1423422495. The cubic root of 5655561 is about 178.1661643244.

It can be divided in two parts, 56555 and 61, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 5655561 in words is "five million, six hundred fifty-five thousand, five hundred sixty-one".