163636161 has 16 divisors (see below), whose sum is σ = 236765760. Its totient is φ = 99927360.

The previous prime is 163636159. The next prime is 163636171. The reversal of 163636161 is 161636361.

It is not a de Polignac number, because 163636161 - 2¹ = 163636159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (163636111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10906 + ... + 21123.

It is an arithmetic number, because the mean of its divisors is an integer number (14797860).

Almost surely, 2^163636161 is an apocalyptic number.

It is an amenable number.

163636161 is a deficient number, since it is larger than the sum of its proper divisors (73129599).

163636161 is a wasteful number, since it uses less digits than its factorization.

163636161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32176.

The product of its digits is 11664, while the sum is 33.

The square root of 163636161 is about 12792.0350609276. The cubic root of 163636161 is about 546.9652818176.

The spelling of 163636161 in words is "one hundred sixty-three million, six hundred thirty-six thousand, one hundred sixty-one".