561888115 has 4 divisors (see below), whose sum is σ = 674265744. Its totient is φ = 449510488.

The previous prime is 561888109. The next prime is 561888127. The reversal of 561888115 is 511888165.

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

It is a cyclic number.

It is not a de Polignac number, because 561888115 - 2⁷ = 561887987 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56188807 + ... + 56188816.

It is an arithmetic number, because the mean of its divisors is an integer number (168566436).

Almost surely, 2^561888115 is an apocalyptic number.

561888115 is a deficient number, since it is larger than the sum of its proper divisors (112377629).

561888115 is a wasteful number, since it uses less digits than its factorization.

561888115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112377628.

The product of its digits is 76800, while the sum is 43.

The square root of 561888115 is about 23704.1792728624. The cubic root of 561888115 is about 825.1823851434.

The spelling of 561888115 in words is "five hundred sixty-one million, eight hundred eighty-eight thousand, one hundred fifteen".