168164424 has 80 divisors (see below), whose sum is σ = 474658800. Its totient is φ = 55621728.

The previous prime is 168164407. The next prime is 168164461. The reversal of 168164424 is 424461861.

It is a happy number.

168164424 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 644 + 2 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89139 + ... + 91005.

It is an arithmetic number, because the mean of its divisors is an integer number (5933235).

Almost surely, 2^168164424 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 168164424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237329400).

168164424 is an abundant number, since it is smaller than the sum of its proper divisors (306494376).

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

168164424 is a wasteful number, since it uses less digits than its factorization.

168164424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2011 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 168164424 is about 12967.8226391326. The cubic root of 168164424 is about 551.9647898146.

The spelling of 168164424 in words is "one hundred sixty-eight million, one hundred sixty-four thousand, four hundred twenty-four".