168778768 has 20 divisors (see below), whose sum is σ = 329096620. Its totient is φ = 83850624.

The previous prime is 168778751. The next prime is 168778859. The reversal of 168778768 is 867877861.

It can be written as a sum of positive squares in 2 ways, for example, as 115605504 + 53173264 = 10752^2 + 7292^2 .

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 3 ways as a sum of consecutive naturals, for example, 31083 + ... + 36106.

It is an arithmetic number, because the mean of its divisors is an integer number (16454831).

Almost surely, 2^168778768 is an apocalyptic number.

It is an amenable number.

168778768 is a deficient number, since it is larger than the sum of its proper divisors (160317852).

168778768 is a wasteful number, since it uses less digits than its factorization.

168778768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67354 (or 67348 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 58.

The square root of 168778768 is about 12991.4882904154. The cubic root of 168778768 is about 552.6361251505.

The spelling of 168778768 in words is "one hundred sixty-eight million, seven hundred seventy-eight thousand, seven hundred sixty-eight".