168013091236 has 9 divisors (see below), whose sum is σ = 294024344299. Its totient is φ = 84006135724.

The previous prime is 168013091219. The next prime is 168013091249. The reversal of 168013091236 is 632190310861.

The square root of 168013091236 is 409894.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 717315 + ... + 922261.

Almost surely, 2^168013091236 is an apocalyptic number.

168013091236 is the 409894-th square number.

It is an amenable number.

168013091236 is a deficient number, since it is larger than the sum of its proper divisors (126011253063).

168013091236 is an frugal number, since it uses more digits than its factorization.

168013091236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409898 (or 204949 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 168013091236 in words is "one hundred sixty-eight billion, thirteen million, ninety-one thousand, two hundred thirty-six".