138861415274548 has 24 divisors (see below), whose sum is σ = 243085883918472. Its totient is φ = 69408306468864.

The previous prime is 138861415274479. The next prime is 138861415274563. The reversal of 138861415274548 is 845472514168831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62390377942564 + 76471037331984 = 7898758^2 + 8744772^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947935086 + ... + 948081562.

It is an arithmetic number, because the mean of its divisors is an integer number (10128578496603).

Almost surely, 2^{138861415274548} is an apocalyptic number.

It is an amenable number.

138861415274548 is a deficient number, since it is larger than the sum of its proper divisors (104224468643924).

138861415274548 is a wasteful number, since it uses less digits than its factorization.

138861415274548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221331 (or 221329 counting only the distinct ones).

The product of its digits is 206438400, while the sum is 67.

The spelling of 138861415274548 in words is "one hundred thirty-eight trillion, eight hundred sixty-one billion, four hundred fifteen million, two hundred seventy-four thousand, five hundred forty-eight".