138465548368 has 20 divisors (see below), whose sum is σ = 306602285920. Its totient is φ = 59342377824.

The previous prime is 138465548363. The next prime is 138465548371. The reversal of 138465548368 is 863845564831.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138465548363) 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 3 ways as a sum of consecutive naturals, for example, 618149658 + ... + 618149881.

It is an arithmetic number, because the mean of its divisors is an integer number (15330114296).

Almost surely, 2^138465548368 is an apocalyptic number.

It is an amenable number.

138465548368 is an abundant number, since it is smaller than the sum of its proper divisors (168136737552).

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

138465548368 is a wasteful number, since it uses less digits than its factorization.

138465548368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236299554 (or 1236299548 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 61.

The spelling of 138465548368 in words is "one hundred thirty-eight billion, four hundred sixty-five million, five hundred forty-eight thousand, three hundred sixty-eight".