561246189 has 8 divisors (see below), whose sum is σ = 855232320. Its totient is φ = 320712096.

The previous prime is 561246167. The next prime is 561246209. The reversal of 561246189 is 981642165.

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

It is not a de Polignac number, because 561246189 - 2⁷ = 561246061 is a prime.

It is a Smith number, since the sum of its digits (42) 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 a self number, because there is not a number n which added to its sum of digits gives 561246189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561247189) 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, 13362984 + ... + 13363025.

It is an arithmetic number, because the mean of its divisors is an integer number (106904040).

Almost surely, 2^561246189 is an apocalyptic number.

It is an amenable number.

561246189 is a deficient number, since it is larger than the sum of its proper divisors (293986131).

561246189 is a wasteful number, since it uses less digits than its factorization.

561246189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26726019.

The product of its digits is 103680, while the sum is 42.

The square root of 561246189 is about 23690.6350484743. The cubic root of 561246189 is about 824.8680237005.

The spelling of 561246189 in words is "five hundred sixty-one million, two hundred forty-six thousand, one hundred eighty-nine".