561611117 has 4 divisors (see below), whose sum is σ = 568377600. Its totient is φ = 554844636.

The previous prime is 561611077. The next prime is 561611189. The reversal of 561611117 is 711116165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561611117 - 2¹² = 561607021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561611117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561611417) 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, 3383117 + ... + 3383282.

It is an arithmetic number, because the mean of its divisors is an integer number (142094400).

Almost surely, 2^561611117 is an apocalyptic number.

It is an amenable number.

561611117 is a deficient number, since it is larger than the sum of its proper divisors (6766483).

561611117 is an equidigital number, since it uses as much as digits as its factorization.

561611117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6766482.

The product of its digits is 1260, while the sum is 29.

The square root of 561611117 is about 23698.3357432542. The cubic root of 561611117 is about 825.0467641689.

The spelling of 561611117 in words is "five hundred sixty-one million, six hundred eleven thousand, one hundred seventeen".