138515566055424 has 208 divisors, whose sum is σ = 384026560919040. Its totient is φ = 44356274749440.

The previous prime is 138515566055423. The next prime is 138515566055431. The reversal of 138515566055424 is 424550665515831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138515566055423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50860032 + ... + 53514240.

It is an arithmetic number, because the mean of its divisors is an integer number (1846281542880).

Almost surely, 2^{138515566055424} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138515566055424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192013280459520).

138515566055424 is an abundant number, since it is smaller than the sum of its proper divisors (245510994863616).

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

138515566055424 is a wasteful number, since it uses less digits than its factorization.

138515566055424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654404 (or 2654382 counting only the distinct ones).

The product of its (nonzero) digits is 86400000, while the sum is 60.

The spelling of 138515566055424 in words is "one hundred thirty-eight trillion, five hundred fifteen billion, five hundred sixty-six million, fifty-five thousand, four hundred twenty-four".