168812266045 has 4 divisors (see below), whose sum is σ = 202574719260. Its totient is φ = 135049812832.

The previous prime is 168812266037. The next prime is 168812266057. The reversal of 168812266045 is 540662218861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540662218861 = 17 ⋅31803659933.

It can be written as a sum of positive squares in 2 ways, for example, as 100843083364 + 67969182681 = 317558^2 + 260709^2 .

It is a cyclic number.

It is not a de Polignac number, because 168812266045 - 2³ = 168812266037 is a prime.

It is a super-4 number, since 4×168812266045⁴ (a number of 46 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 168812266045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16881226600 + ... + 16881226609.

It is an arithmetic number, because the mean of its divisors is an integer number (50643679815).

Almost surely, 2^168812266045 is an apocalyptic number.

It is an amenable number.

168812266045 is a deficient number, since it is larger than the sum of its proper divisors (33762453215).

168812266045 is an equidigital number, since it uses as much as digits as its factorization.

168812266045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33762453214.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 168812266045 in words is "one hundred sixty-eight billion, eight hundred twelve million, two hundred sixty-six thousand, forty-five".