168778612 has 12 divisors (see below), whose sum is σ = 302231776. Its totient is φ = 82426680.

The previous prime is 168778609. The next prime is 168778613. The reversal of 168778612 is 216877861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168778613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490464 + ... + 490807.

Almost surely, 2^168778612 is an apocalyptic number.

It is an amenable number.

168778612 is a deficient number, since it is larger than the sum of its proper divisors (133453164).

168778612 is a wasteful number, since it uses less digits than its factorization.

168778612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981318 (or 981316 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 168778612 is about 12991.4822864829. The cubic root of 168778612 is about 552.6359548857.

The spelling of 168778612 in words is "one hundred sixty-eight million, seven hundred seventy-eight thousand, six hundred twelve".