168506361 has 9 divisors (see below), whose sum is σ = 243454341. Its totient is φ = 112311612.

The previous prime is 168506341. The next prime is 168506389. The reversal of 168506361 is 163605861.

It is a happy number.

The square root of 168506361 is 12981.

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

168506361 is a `hidden beast` number, since 16 + 8 + 5 + 0 + 636 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 168506361 - 2⁹ = 168505849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168506341) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36780 + ... + 41106.

Almost surely, 2^168506361 is an apocalyptic number.

168506361 is the 12981-st square number.

168506361 is the 6491-st centered octagonal number.

It is an amenable number.

168506361 is a deficient number, since it is larger than the sum of its proper divisors (74947980).

168506361 is an frugal number, since it uses more digits than its factorization.

168506361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8660 (or 4330 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 168506361 is about 552.3386489248.

Multiplying 168506361 by its sum of digits (36), we get a square (6066228996 = 77886²).

The spelling of 168506361 in words is "one hundred sixty-eight million, five hundred six thousand, three hundred sixty-one".