168992818 has 16 divisors (see below), whose sum is σ = 271172664. Its totient is φ = 78704640.

The previous prime is 168992809. The next prime is 168992867. The reversal of 168992818 is 818299861.

It can be written as a sum of positive squares in 4 ways, for example, as 152695449 + 16297369 = 12357^2 + 4037^2 .

It is a super-2 number, since 2×168992818² = 57117145071162248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22323 + ... + 28918.

Almost surely, 2^168992818 is an apocalyptic number.

168992818 is a deficient number, since it is larger than the sum of its proper divisors (102179846).

168992818 is a wasteful number, since it uses less digits than its factorization.

168992818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51357.

The product of its digits is 497664, while the sum is 52.

The square root of 168992818 is about 12999.7237662960. The cubic root of 168992818 is about 552.8696493712.

The spelling of 168992818 in words is "one hundred sixty-eight million, nine hundred ninety-two thousand, eight hundred eighteen".