168805818 has 24 divisors (see below), whose sum is σ = 387261108. Its totient is φ = 52958592.

The previous prime is 168805817. The next prime is 168805853. The reversal of 168805818 is 818508861.

It is a happy number.

168805818 is a `hidden beast` number, since 1 + 68 + 8 + 0 + 581 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 130576329 + 38229489 = 11427^2 + 6183^2 .

It is not an unprimeable number, because it can be changed into a prime (168805817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275521 + ... + 276132.

Almost surely, 2^168805818 is an apocalyptic number.

168805818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

168805818 is an abundant number, since it is smaller than the sum of its proper divisors (218455290).

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

168805818 is a wasteful number, since it uses less digits than its factorization.

168805818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551678 (or 551675 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 45.

The square root of 168805818 is about 12992.5293149563. The cubic root of 168805818 is about 552.6656470483.

The spelling of 168805818 in words is "one hundred sixty-eight million, eight hundred five thousand, eight hundred eighteen".