168055537 has 4 divisors (see below), whose sum is σ = 180982900. Its totient is φ = 155128176.

The previous prime is 168055529. The next prime is 168055561. The reversal of 168055537 is 735550861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51609856 + 116445681 = 7184^2 + 10791^2 .

It is a cyclic number.

It is not a de Polignac number, because 168055537 - 2³ = 168055529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168055537.

It is not an unprimeable number, because it can be changed into a prime (168055337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6463662 + ... + 6463687.

It is an arithmetic number, because the mean of its divisors is an integer number (45245725).

Almost surely, 2^168055537 is an apocalyptic number.

It is an amenable number.

168055537 is a deficient number, since it is larger than the sum of its proper divisors (12927363).

168055537 is a wasteful number, since it uses less digits than its factorization.

168055537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12927362.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 168055537 is about 12963.6236060756. The cubic root of 168055537 is about 551.8456311060.

The spelling of 168055537 in words is "one hundred sixty-eight million, fifty-five thousand, five hundred thirty-seven".