163725165 has 32 divisors (see below), whose sum is σ = 291600000. Its totient is φ = 87160320.

The previous prime is 163725157. The next prime is 163725169. The reversal of 163725165 is 561527361.

163725165 is a `hidden beast` number, since 1 + 637 + 2 + 5 + 16 + 5 = 666.

It is not a de Polignac number, because 163725165 - 2³ = 163725157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163725169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130461 + ... + 131709.

It is an arithmetic number, because the mean of its divisors is an integer number (9112500).

Almost surely, 2^163725165 is an apocalyptic number.

163725165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163725165 is a deficient number, since it is larger than the sum of its proper divisors (127874835).

163725165 is a wasteful number, since it uses less digits than its factorization.

163725165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 2228 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 163725165 is about 12795.5134715259. The cubic root of 163725165 is about 547.0644312028.

The spelling of 163725165 in words is "one hundred sixty-three million, seven hundred twenty-five thousand, one hundred sixty-five".