138465548372 has 6 divisors (see below), whose sum is σ = 242314709658. Its totient is φ = 69232774184.

The previous prime is 138465548371. The next prime is 138465548399. The reversal of 138465548372 is 273845564831.

It can be written as a sum of positive squares in only one way, i.e., 85448643856 + 53016904516 = 292316^2 + 230254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138465548371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17308193543 + ... + 17308193550.

It is an arithmetic number, because the mean of its divisors is an integer number (40385784943).

Almost surely, 2^138465548372 is an apocalyptic number.

It is an amenable number.

138465548372 is a deficient number, since it is larger than the sum of its proper divisors (103849161286).

138465548372 is a wasteful number, since it uses less digits than its factorization.

138465548372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34616387097 (or 34616387095 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 56.

The spelling of 138465548372 in words is "one hundred thirty-eight billion, four hundred sixty-five million, five hundred forty-eight thousand, three hundred seventy-two".