561656041 has 4 divisors (see below), whose sum is σ = 576835972. Its totient is φ = 546476112.

The previous prime is 561656033. The next prime is 561656059. The reversal of 561656041 is 140656165.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 385297641 + 176358400 = 19629^2 + 13280^2 .

It is a cyclic number.

It is not a de Polignac number, because 561656041 - 2³ = 561656033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561655988 and 561656006.

It is not an unprimeable number, because it can be changed into a prime (561656141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7589910 + ... + 7589983.

It is an arithmetic number, because the mean of its divisors is an integer number (144208993).

Almost surely, 2^561656041 is an apocalyptic number.

It is an amenable number.

561656041 is a deficient number, since it is larger than the sum of its proper divisors (15179931).

561656041 is a wasteful number, since it uses less digits than its factorization.

561656041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15179930.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 561656041 is about 23699.2835545719. The cubic root of 561656041 is about 825.0687624351.

The spelling of 561656041 in words is "five hundred sixty-one million, six hundred fifty-six thousand, forty-one".