561165552306 has 12 divisors (see below), whose sum is σ = 1215858696702. Its totient is φ = 187055184096.

The previous prime is 561165552301. The next prime is 561165552319. The reversal of 561165552306 is 603255561165.

561165552306 is a `hidden beast` number, since 5 + 6 + 1 + 1 + 65 + 552 + 30 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 335501600625 + 225663951681 = 579225^2 + 475041^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (561165552301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15587931991 + ... + 15587932026.

Almost surely, 2^561165552306 is an apocalyptic number.

561165552306 is an abundant number, since it is smaller than the sum of its proper divisors (654693144396).

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

561165552306 is a wasteful number, since it uses less digits than its factorization.

561165552306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31175864025 (or 31175864022 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 561165552306 in words is "five hundred sixty-one billion, one hundred sixty-five million, five hundred fifty-two thousand, three hundred six".