168643278244 has 27 divisors (see below), whose sum is σ = 343321234977. Its totient is φ = 72273226704.

The previous prime is 168643278233. The next prime is 168643278299. The reversal of 168643278244 is 442872346861.

The square root of 168643278244 is 410662.

It is a perfect power (a square), and thus also a powerful number.

168643278244 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 137070252900 + 31573025344 = 370230^2 + 177688^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5734602 + ... + 5763934.

Almost surely, 2^168643278244 is an apocalyptic number.

168643278244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

168643278244 is the 410662-nd square number.

It is an amenable number.

168643278244 is an abundant number, since it is smaller than the sum of its proper divisors (174677956733).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168643278244 is an frugal number, since it uses more digits than its factorization.

168643278244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58684 (or 29342 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 55.

The spelling of 168643278244 in words is "one hundred sixty-eight billion, six hundred forty-three million, two hundred seventy-eight thousand, two hundred forty-four".