163606422642561 has 6 divisors (see below), whose sum is σ = 236320388261490. Its totient is φ = 109070948428368.

The previous prime is 163606422642503. The next prime is 163606422642581. The reversal of 163606422642561 is 165246224606361.

163606422642561 is a `hidden beast` number, since 1 + 6 + 3 + 606 + 4 + 2 + 2 + 6 + 4 + 25 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 91346647311936 + 72259775330625 = 9557544^2 + 8500575^2 .

It is not a de Polignac number, because 163606422642561 - 2⁶ = 163606422642497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163606422642498 and 163606422642507.

It is not an unprimeable number, because it can be changed into a prime (163606422642581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9089245702356 + ... + 9089245702373.

It is an arithmetic number, because the mean of its divisors is an integer number (39386731376915).

Almost surely, 2^{163606422642561} is an apocalyptic number.

It is an amenable number.

163606422642561 is a deficient number, since it is larger than the sum of its proper divisors (72713965618929).

163606422642561 is a wasteful number, since it uses less digits than its factorization.

163606422642561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18178491404735 (or 18178491404732 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 54.

The spelling of 163606422642561 in words is "one hundred sixty-three trillion, six hundred six billion, four hundred twenty-two million, six hundred forty-two thousand, five hundred sixty-one".