164813868 has 18 divisors (see below), whose sum is σ = 416612924. Its totient is φ = 54937944.

The previous prime is 164813867. The next prime is 164813881. The reversal of 164813868 is 868318461.

It is a happy number.

164813868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×164813868² = 54327222170242848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164813863) 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, 2289046 + ... + 2289117.

Almost surely, 2^164813868 is an apocalyptic number.

164813868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164813868 is an abundant number, since it is smaller than the sum of its proper divisors (251799056).

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

164813868 is a wasteful number, since it uses less digits than its factorization.

164813868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578173 (or 4578168 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 164813868 is about 12837.9853559661. The cubic root of 164813868 is about 548.2743356198.

The spelling of 164813868 in words is "one hundred sixty-four million, eight hundred thirteen thousand, eight hundred sixty-eight".