168020168 has 8 divisors (see below), whose sum is σ = 315037830. Its totient is φ = 84010080.

The previous prime is 168020161. The next prime is 168020183. The reversal of 168020168 is 861020861.

It can be written as a sum of positive squares in only one way, i.e., 168013444 + 6724 = 12962^2 + 82^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (168020161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501253 + ... + 10501268.

Almost surely, 2^168020168 is an apocalyptic number.

It is an amenable number.

168020168 is a deficient number, since it is larger than the sum of its proper divisors (147017662).

168020168 is a wasteful number, since it uses less digits than its factorization.

168020168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21002527 (or 21002523 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 168020168 is about 12962.2593709584. The cubic root of 168020168 is about 551.8069145446.

The spelling of 168020168 in words is "one hundred sixty-eight million, twenty thousand, one hundred sixty-eight".