163686864 has 60 divisors (see below), whose sum is σ = 464810528. Its totient is φ = 49600320.

The previous prime is 163686847. The next prime is 163686907. The reversal of 163686864 is 468686361.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8284 + ... + 19899.

Almost surely, 2^163686864 is an apocalyptic number.

It is an amenable number.

163686864 is an abundant number, since it is smaller than the sum of its proper divisors (301123664).

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

163686864 is a wasteful number, since it uses less digits than its factorization.

163686864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28216 (or 28199 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 163686864 is about 12794.0167265797. The cubic root of 163686864 is about 547.0217687551.

163686864 divided by its sum of digits (48) gives a palindrome (3410143).

It can be divided in two parts, 16368 and 6864, that added together give a palindrome (23232).

The spelling of 163686864 in words is "one hundred sixty-three million, six hundred eighty-six thousand, eight hundred sixty-four".