168537385 has 8 divisors (see below), whose sum is σ = 202457736. Its totient is φ = 134688000.

The previous prime is 168537349. The next prime is 168537389. The reversal of 168537385 is 583735861.

It can be written as a sum of positive squares in 4 ways, for example, as 57108249 + 111429136 = 7557^2 + 10556^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168537385 - 2¹¹ = 168535337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168537389) by changing a digit.

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, 12366 + ... + 22135.

It is an arithmetic number, because the mean of its divisors is an integer number (25307217).

Almost surely, 2^168537385 is an apocalyptic number.

It is an amenable number.

168537385 is a deficient number, since it is larger than the sum of its proper divisors (33920351).

168537385 is an equidigital number, since it uses as much as digits as its factorization.

168537385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35483.

The product of its digits is 604800, while the sum is 46.

The square root of 168537385 is about 12982.1949222772. The cubic root of 168537385 is about 552.3725441887.

The spelling of 168537385 in words is "one hundred sixty-eight million, five hundred thirty-seven thousand, three hundred eighty-five".