561678158 has 16 divisors (see below), whose sum is σ = 851940960. Its totient is φ = 277706016.

The previous prime is 561678149. The next prime is 561678191. The reversal of 561678158 is 851876165.

It is a happy number.

561678158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179108 + ... + 182216.

It is an arithmetic number, because the mean of its divisors is an integer number (53246310).

Almost surely, 2^561678158 is an apocalyptic number.

561678158 is a deficient number, since it is larger than the sum of its proper divisors (290262802).

561678158 is a wasteful number, since it uses less digits than its factorization.

561678158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its digits is 403200, while the sum is 47.

The square root of 561678158 is about 23699.7501674596. The cubic root of 561678158 is about 825.0795921986.

The spelling of 561678158 in words is "five hundred sixty-one million, six hundred seventy-eight thousand, one hundred fifty-eight".