561102861 has 16 divisors (see below), whose sum is σ = 816565248. Its totient is φ = 339889200.

The previous prime is 561102853. The next prime is 561102877. The reversal of 561102861 is 168201165.

It is not a de Polignac number, because 561102861 - 2³ = 561102853 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561102811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96540 + ... + 102186.

It is an arithmetic number, because the mean of its divisors is an integer number (51035328).

Almost surely, 2^561102861 is an apocalyptic number.

It is an amenable number.

561102861 is a deficient number, since it is larger than the sum of its proper divisors (255462387).

561102861 is a wasteful number, since it uses less digits than its factorization.

561102861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8672.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 561102861 is about 23687.6098625421. The cubic root of 561102861 is about 824.7978009522.

The spelling of 561102861 in words is "five hundred sixty-one million, one hundred two thousand, eight hundred sixty-one".