138161678 has 16 divisors (see below), whose sum is σ = 211292160. Its totient is φ = 67743000.

The previous prime is 138161671. The next prime is 138161701. The reversal of 138161678 is 876161831.

138161678 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138161671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20963 + ... + 26753.

It is an arithmetic number, because the mean of its divisors is an integer number (13205760).

Almost surely, 2^138161678 is an apocalyptic number.

138161678 is a deficient number, since it is larger than the sum of its proper divisors (73130482).

138161678 is a wasteful number, since it uses less digits than its factorization.

138161678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023.

The product of its digits is 48384, while the sum is 41.

The square root of 138161678 is about 11754.2195827711. The cubic root of 138161678 is about 516.9666569091.

The spelling of 138161678 in words is "one hundred thirty-eight million, one hundred sixty-one thousand, six hundred seventy-eight".