168556149 has 24 divisors (see below), whose sum is σ = 253389240. Its totient is φ = 107839872.

The previous prime is 168556133. The next prime is 168556153. The reversal of 168556149 is 941655861.

168556149 is a `hidden beast` number, since 1 + 6 + 85 + 561 + 4 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 64883025 + 103673124 = 8055^2 + 10182^2 .

It is not a de Polignac number, because 168556149 - 2⁴ = 168556133 is a prime.

It is a super-3 number, since 3×168556149³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168556159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43287 + ... + 47019.

It is an arithmetic number, because the mean of its divisors is an integer number (10557885).

Almost surely, 2^168556149 is an apocalyptic number.

It is an amenable number.

168556149 is a deficient number, since it is larger than the sum of its proper divisors (84833091).

168556149 is a wasteful number, since it uses less digits than its factorization.

168556149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941 (or 3938 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 168556149 is about 12982.9175842720. The cubic root of 168556149 is about 552.3930427738.

The spelling of 168556149 in words is "one hundred sixty-eight million, five hundred fifty-six thousand, one hundred forty-nine".