138761717866144 has 12 divisors (see below), whose sum is σ = 273187132049034. Its totient is φ = 69380858933056.

The previous prime is 138761717866111. The next prime is 138761717866147. The reversal of 138761717866144 is 441668717167831.

138761717866144 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 86043953376144 + 52717764490000 = 9275988^2 + 7260700^2 .

It is not an unprimeable number, because it can be changed into a prime (138761717866147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2168151841627 + ... + 2168151841690.

Almost surely, 2^{138761717866144} is an apocalyptic number.

It is an amenable number.

138761717866144 is a deficient number, since it is larger than the sum of its proper divisors (134425414182890).

138761717866144 is an equidigital number, since it uses as much as digits as its factorization.

138761717866144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336303683327 (or 4336303683319 counting only the distinct ones).

The product of its digits is 227598336, while the sum is 70.

The spelling of 138761717866144 in words is "one hundred thirty-eight trillion, seven hundred sixty-one billion, seven hundred seventeen million, eight hundred sixty-six thousand, one hundred forty-four".