138861324750544 has 40 divisors (see below), whose sum is σ = 296245358110368. Its totient is φ = 62528888791680.

The previous prime is 138861324750503. The next prime is 138861324750581. The reversal of 138861324750544 is 445057423168831.

It is a super-2 number, since 2×138861324750544² (a number of 29 digits) contains 22 as substring.

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, 3686826027 + ... + 3686863690.

Almost surely, 2^{138861324750544} is an apocalyptic number.

It is an amenable number.

138861324750544 is an abundant number, since it is smaller than the sum of its proper divisors (157384033359824).

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

138861324750544 is a wasteful number, since it uses less digits than its factorization.

138861324750544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373689843 (or 7373689837 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 61.

The spelling of 138861324750544 in words is "one hundred thirty-eight trillion, eight hundred sixty-one billion, three hundred twenty-four million, seven hundred fifty thousand, five hundred forty-four".