561116055 has 8 divisors (see below), whose sum is σ = 897785712. Its totient is φ = 299261888.

The previous prime is 561116029. The next prime is 561116057. The reversal of 561116055 is 550611165.

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

It is a cyclic number.

It is not a de Polignac number, because 561116055 - 2⁸ = 561115799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561116057) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18703854 + ... + 18703883.

It is an arithmetic number, because the mean of its divisors is an integer number (112223214).

Almost surely, 2^561116055 is an apocalyptic number.

561116055 is a deficient number, since it is larger than the sum of its proper divisors (336669657).

561116055 is a wasteful number, since it uses less digits than its factorization.

561116055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37407745.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 561116055 is about 23687.8883609325. Note that the first 3 decimals coincide. The cubic root of 561116055 is about 824.8042657781.

It can be divided in two parts, 56 and 1116055, that added together give a palindrome (1116111).

The spelling of 561116055 in words is "five hundred sixty-one million, one hundred sixteen thousand, fifty-five".