163655165 has 8 divisors (see below), whose sum is σ = 196470360. Its totient is φ = 130868032.

The previous prime is 163655161. The next prime is 163655171. The reversal of 163655165 is 561556361.

It can be written as a sum of positive squares in 4 ways, for example, as 1194649 + 162460516 = 1093^2 + 12746^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 163655165 - 2² = 163655161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163655161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9251 + ... + 20319.

It is an arithmetic number, because the mean of its divisors is an integer number (24558795).

Almost surely, 2^163655165 is an apocalyptic number.

It is an amenable number.

163655165 is a deficient number, since it is larger than the sum of its proper divisors (32815195).

163655165 is a wasteful number, since it uses less digits than its factorization.

163655165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14031.

The product of its digits is 81000, while the sum is 38.

The square root of 163655165 is about 12792.7778453313. Note that the first 3 decimals coincide. The cubic root of 163655165 is about 546.9864550631.

The spelling of 163655165 in words is "one hundred sixty-three million, six hundred fifty-five thousand, one hundred sixty-five".