168639168 has 56 divisors (see below), whose sum is σ = 447235072. Its totient is φ = 56081664.

The previous prime is 168639157. The next prime is 168639179. The reversal of 168639168 is 861936861.

It is an interprime number because it is at equal distance from previous prime (168639157) and next prime (168639179).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115821 + ... + 117267.

Almost surely, 2^168639168 is an apocalyptic number.

It is an amenable number.

168639168 is an abundant number, since it is smaller than the sum of its proper divisors (278595904).

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

168639168 is a wasteful number, since it uses less digits than its factorization.

168639168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2059 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 168639168 is about 12986.1144304214. The cubic root of 168639168 is about 552.4837179808.

The spelling of 168639168 in words is "one hundred sixty-eight million, six hundred thirty-nine thousand, one hundred sixty-eight".