138217451178 has 8 divisors (see below), whose sum is σ = 276434902368. Its totient is φ = 46072483724.

The previous prime is 138217451173. The next prime is 138217451179. The reversal of 138217451178 is 871154712831.

138217451178 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

138217451178 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (138217451173) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11518120926 + ... + 11518120937.

It is an arithmetic number, because the mean of its divisors is an integer number (34554362796).

Almost surely, 2^138217451178 is an apocalyptic number.

138217451178 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138217451178 is a wasteful number, since it uses less digits than its factorization.

138217451178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23036241868.

The product of its digits is 376320, while the sum is 48.

The spelling of 138217451178 in words is "one hundred thirty-eight billion, two hundred seventeen million, four hundred fifty-one thousand, one hundred seventy-eight".