138820351244168 has 64 divisors (see below), whose sum is σ = 294686632656000. Its totient is φ = 60728393689600.

The previous prime is 138820351244167. The next prime is 138820351244173. The reversal of 138820351244168 is 861442153028831.

It is not an unprimeable number, because it can be changed into a prime (138820351244167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86660813 + ... + 88248156.

It is an arithmetic number, because the mean of its divisors is an integer number (4604478635250).

Almost surely, 2^{138820351244168} is an apocalyptic number.

It is an amenable number.

138820351244168 is an abundant number, since it is smaller than the sum of its proper divisors (155866281411832).

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

138820351244168 is a wasteful number, since it uses less digits than its factorization.

138820351244168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174909326 (or 174909322 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 138820351244168 in words is "one hundred thirty-eight trillion, eight hundred twenty billion, three hundred fifty-one million, two hundred forty-four thousand, one hundred sixty-eight".