168535538522 has 16 divisors (see below), whose sum is σ = 272260451400. Its totient is φ = 77782565952.

The previous prime is 168535538471. The next prime is 168535538539. The reversal of 168535538522 is 225835535861.

It is a happy number.

168535538522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51161463721 + 117374074801 = 226189^2 + 342599^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628748 + ... + 855800.

Almost surely, 2^168535538522 is an apocalyptic number.

168535538522 is a deficient number, since it is larger than the sum of its proper divisors (103724912878).

168535538522 is a wasteful number, since it uses less digits than its factorization.

168535538522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255617.

The product of its digits is 8640000, while the sum is 53.

The spelling of 168535538522 in words is "one hundred sixty-eight billion, five hundred thirty-five million, five hundred thirty-eight thousand, five hundred twenty-two".