163868864 has 42 divisors (see below), whose sum is σ = 329737212. Its totient is φ = 80800000.

The previous prime is 163868857. The next prime is 163868869. The reversal of 163868864 is 468868361.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (163868869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 652739 + ... + 652989.

It is an arithmetic number, because the mean of its divisors is an integer number (7850886).

Almost surely, 2^163868864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163868864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164868606).

163868864 is an abundant number, since it is smaller than the sum of its proper divisors (165868348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163868864 is an equidigital number, since it uses as much as digits as its factorization.

163868864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 354 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 50.

The square root of 163868864 is about 12801.1274503459. The cubic root of 163868864 is about 547.2244343477.

The spelling of 163868864 in words is "one hundred sixty-three million, eight hundred sixty-eight thousand, eight hundred sixty-four".