168210045 has 12 divisors (see below), whose sum is σ = 291564156. Its totient is φ = 89712000.

The previous prime is 168210043. The next prime is 168210067. The reversal of 168210045 is 540012861.

It can be written as a sum of positive squares in 2 ways, for example, as 23561316 + 144648729 = 4854^2 + 12027^2 .

It is not a de Polignac number, because 168210045 - 2¹ = 168210043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168210043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1868956 + ... + 1869045.

It is an arithmetic number, because the mean of its divisors is an integer number (24297013).

Almost surely, 2^168210045 is an apocalyptic number.

168210045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168210045 is a deficient number, since it is larger than the sum of its proper divisors (123354111).

168210045 is a wasteful number, since it uses less digits than its factorization.

168210045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738012 (or 3738009 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 168210045 is about 12969.5815275590. The cubic root of 168210045 is about 552.0146991202.

The spelling of 168210045 in words is "one hundred sixty-eight million, two hundred ten thousand, forty-five".