561117612 has 96 divisors (see below), whose sum is σ = 1468051200. Its totient is φ = 165369600.

The previous prime is 561117611. The next prime is 561117619. The reversal of 561117612 is 216711165.

It is a self number, because there is not a number n which added to its sum of digits gives 561117612.

It is not an unprimeable number, because it can be changed into a prime (561117611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 848562 + ... + 849222.

It is an arithmetic number, because the mean of its divisors is an integer number (15292200).

Almost surely, 2^561117612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561117612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734025600).

561117612 is an abundant number, since it is smaller than the sum of its proper divisors (906933588).

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

561117612 is a wasteful number, since it uses less digits than its factorization.

561117612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 845 counting only the distinct ones).

The product of its digits is 2520, while the sum is 30.

The square root of 561117612 is about 23687.9212258062. The cubic root of 561117612 is about 824.8050286737.

Adding to 561117612 its reverse (216711165), we get a palindrome (777828777).

The spelling of 561117612 in words is "five hundred sixty-one million, one hundred seventeen thousand, six hundred twelve".