561898195 has 16 divisors (see below), whose sum is σ = 720625248. Its totient is φ = 419115520.

The previous prime is 561898177. The next prime is 561898217. The reversal of 561898195 is 591898165.

It is not a de Polignac number, because 561898195 - 2⁵ = 561898163 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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21796 + ... + 39985.

It is an arithmetic number, because the mean of its divisors is an integer number (45039078).

Almost surely, 2^561898195 is an apocalyptic number.

561898195 is a deficient number, since it is larger than the sum of its proper divisors (158727053).

561898195 is a wasteful number, since it uses less digits than its factorization.

561898195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61910.

The product of its digits is 777600, while the sum is 52.

The square root of 561898195 is about 23704.3918926430. The cubic root of 561898195 is about 825.1873195710.

The spelling of 561898195 in words is "five hundred sixty-one million, eight hundred ninety-eight thousand, one hundred ninety-five".