138165168 has 40 divisors (see below), whose sum is σ = 357929968. Its totient is φ = 45925632.

The previous prime is 138165161. The next prime is 138165173. The reversal of 138165168 is 861561831.

It is a super-2 number, since 2×138165168² = 38179227296936448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138165161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14046 + ... + 21762.

Almost surely, 2^138165168 is an apocalyptic number.

It is an amenable number.

138165168 is an abundant number, since it is smaller than the sum of its proper divisors (219764800).

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

138165168 is a wasteful number, since it uses less digits than its factorization.

138165168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8101 (or 8095 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 138165168 is about 11754.3680391589. The cubic root of 138165168 is about 516.9710097766.

The spelling of 138165168 in words is "one hundred thirty-eight million, one hundred sixty-five thousand, one hundred sixty-eight".