168855845 has 4 divisors (see below), whose sum is σ = 202627020. Its totient is φ = 135084672.

The previous prime is 168855839. The next prime is 168855847. The reversal of 168855845 is 548558861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548558861 = 19 ⋅28871519.

It can be written as a sum of positive squares in 2 ways, for example, as 22591009 + 146264836 = 4753^2 + 12094^2 .

It is a cyclic number.

It is not a de Polignac number, because 168855845 - 2¹⁰ = 168854821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168855793 and 168855802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168855847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16885580 + ... + 16885589.

It is an arithmetic number, because the mean of its divisors is an integer number (50656755).

Almost surely, 2^168855845 is an apocalyptic number.

It is an amenable number.

168855845 is a deficient number, since it is larger than the sum of its proper divisors (33771175).

168855845 is an equidigital number, since it uses as much as digits as its factorization.

168855845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33771174.

The product of its digits is 1536000, while the sum is 50.

The square root of 168855845 is about 12994.4543940867. The cubic root of 168855845 is about 552.7202373341.

The spelling of 168855845 in words is "one hundred sixty-eight million, eight hundred fifty-five thousand, eight hundred forty-five".