561658198 has 8 divisors (see below), whose sum is σ = 842614920. Its totient is φ = 280786560.

The previous prime is 561658159. The next prime is 561658199. The reversal of 561658198 is 891856165.

561658198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×561658198³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561658199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843 + ... + 33526.

It is an arithmetic number, because the mean of its divisors is an integer number (105326865).

Almost surely, 2^561658198 is an apocalyptic number.

561658198 is a deficient number, since it is larger than the sum of its proper divisors (280956722).

561658198 is a wasteful number, since it uses less digits than its factorization.

561658198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42542.

The product of its digits is 518400, while the sum is 49.

The square root of 561658198 is about 23699.3290622330. The cubic root of 561658198 is about 825.0698186397.

The spelling of 561658198 in words is "five hundred sixty-one million, six hundred fifty-eight thousand, one hundred ninety-eight".