168444261 has 12 divisors (see below), whose sum is σ = 243449388. Its totient is φ = 112231104.

The previous prime is 168444251. The next prime is 168444281. The reversal of 168444261 is 162444861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10439361 + 158004900 = 3231^2 + 12570^2 .

It is not a de Polignac number, because 168444261 - 2¹¹ = 168442213 is a prime.

It is a super-2 number, since 2×168444261² = 56746938127672242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168444251) 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, 15031 + ... + 23723.

It is an arithmetic number, because the mean of its divisors is an integer number (20287449).

Almost surely, 2^168444261 is an apocalyptic number.

It is an amenable number.

168444261 is a deficient number, since it is larger than the sum of its proper divisors (75005127).

168444261 is a wasteful number, since it uses less digits than its factorization.

168444261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10852 (or 10849 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 168444261 is about 12978.6078221048. The cubic root of 168444261 is about 552.2707890839.

The spelling of 168444261 in words is "one hundred sixty-eight million, four hundred forty-four thousand, two hundred sixty-one".