104163561 has 12 divisors (see below), whose sum is σ = 151840260. Its totient is φ = 68804640.

The previous prime is 104163487. The next prime is 104163581. The reversal of 104163561 is 165361401.

104163561 is a `hidden beast` number, since 1 + 0 + 41 + 63 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31573161 + 72590400 = 5619^2 + 8520^2 .

It is not a de Polignac number, because 104163561 - 2⁹ = 104163049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (104163581) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52110 + ... + 54071.

It is an arithmetic number, because the mean of its divisors is an integer number (12653355).

Almost surely, 2^104163561 is an apocalyptic number.

It is an amenable number.

104163561 is a deficient number, since it is larger than the sum of its proper divisors (47676699).

104163561 is a wasteful number, since it uses less digits than its factorization.

104163561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106296 (or 106293 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 104163561 is about 10206.0551144896. The cubic root of 104163561 is about 470.5133383233.

Subtracting from 104163561 its product of nonzero digits (2160), we obtain a palindrome (104161401).

The spelling of 104163561 in words is "one hundred four million, one hundred sixty-three thousand, five hundred sixty-one".