163641123 has 12 divisors (see below), whose sum is σ = 236590848. Its totient is φ = 108992400.

The previous prime is 163641119. The next prime is 163641173. The reversal of 163641123 is 321146361.

163641123 is a `hidden beast` number, since 1 + 6 + 3 + 641 + 12 + 3 = 666.

163641123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163641123 - 2² = 163641119 is a prime.

It is a super-2 number, since 2×163641123² = 53556834273402258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163641173) 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, 2461 + ... + 18257.

It is an arithmetic number, because the mean of its divisors is an integer number (19715904).

Almost surely, 2^163641123 is an apocalyptic number.

163641123 is a deficient number, since it is larger than the sum of its proper divisors (72949725).

163641123 is a wasteful number, since it uses less digits than its factorization.

163641123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16954 (or 16951 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 163641123 is about 12792.2290082690. The cubic root of 163641123 is about 546.9708103721.

Adding to 163641123 its reverse (321146361), we get a palindrome (484787484).

The spelling of 163641123 in words is "one hundred sixty-three million, six hundred forty-one thousand, one hundred twenty-three".