561116405 has 4 divisors (see below), whose sum is σ = 673339692. Its totient is φ = 448893120.

The previous prime is 561116393. The next prime is 561116411. The reversal of 561116405 is 504611165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 206698129 + 354418276 = 14377^2 + 18826^2 .

It is not a de Polignac number, because 561116405 - 2¹² = 561112309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56111636 + ... + 56111645.

It is an arithmetic number, because the mean of its divisors is an integer number (168334923).

Almost surely, 2^561116405 is an apocalyptic number.

It is an amenable number.

561116405 is a deficient number, since it is larger than the sum of its proper divisors (112223287).

561116405 is a wasteful number, since it uses less digits than its factorization.

561116405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112223286.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 561116405 is about 23687.8957486730. The cubic root of 561116405 is about 824.8044372705.

The spelling of 561116405 in words is "five hundred sixty-one million, one hundred sixteen thousand, four hundred five".