168538768 has 20 divisors (see below), whose sum is σ = 331419760. Its totient is φ = 83011104.

The previous prime is 168538763. The next prime is 168538787. The reversal of 168538768 is 867835861.

It is not an unprimeable number, because it can be changed into a prime (168538763) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 77538 + ... + 79681.

It is an arithmetic number, because the mean of its divisors is an integer number (16570988).

Almost surely, 2^168538768 is an apocalyptic number.

It is an amenable number.

168538768 is a deficient number, since it is larger than the sum of its proper divisors (162880992).

168538768 is a wasteful number, since it uses less digits than its factorization.

168538768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157294 (or 157288 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 168538768 is about 12982.2481874289. The cubic root of 168538768 is about 552.3740550882.

The spelling of 168538768 in words is "one hundred sixty-eight million, five hundred thirty-eight thousand, seven hundred sixty-eight".