168513418 has 16 divisors (see below), whose sum is σ = 269195400. Its totient is φ = 78839296.

The previous prime is 168513361. The next prime is 168513421. The reversal of 168513418 is 814315861.

It can be written as a sum of positive squares in 4 ways, for example, as 168402529 + 110889 = 12977^2 + 333^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8443 + ... + 20206.

Almost surely, 2^168513418 is an apocalyptic number.

168513418 is a deficient number, since it is larger than the sum of its proper divisors (100681982).

168513418 is a wasteful number, since it uses less digits than its factorization.

168513418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28841.

The product of its digits is 23040, while the sum is 37.

The square root of 168513418 is about 12981.2718175069. The cubic root of 168513418 is about 552.3463594140.

The spelling of 168513418 in words is "one hundred sixty-eight million, five hundred thirteen thousand, four hundred eighteen".