163618 has 32 divisors (see below), whose sum is σ = 322560. Its totient is φ = 60480.

The previous prime is 163613. The next prime is 163621. The reversal of 163618 is 816361.

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

It is a junction number, because it is equal to n+sod(n) for n = 163592 and 163601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163613) 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, 5263 + ... + 5293.

It is an arithmetic number, because the mean of its divisors is an integer number (10080).

2¹⁶³⁶¹⁸ is an apocalyptic number.

163618 is a deficient number, since it is larger than the sum of its proper divisors (158942).

163618 is a wasteful number, since it uses less digits than its factorization.

163618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82.

The product of its digits is 864, while the sum is 25.

The square root of 163618 is about 404.4972187791. The cubic root of 163618 is about 54.6945046266.

Adding to 163618 its reverse (816361), we get a palindrome (979979).

The spelling of 163618 in words is "one hundred sixty-three thousand, six hundred eighteen".