138838631535501 has 16 divisors (see below), whose sum is σ = 185523181208640. Its totient is φ = 92356679975040.

The previous prime is 138838631535497. The next prime is 138838631535503. The reversal of 138838631535501 is 105535136838831.

It is not a de Polignac number, because 138838631535501 - 2² = 138838631535497 is a prime.

It is a super-2 number, since 2×138838631535501² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138838631535503) 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, 6063031 + ... + 17732388.

It is an arithmetic number, because the mean of its divisors is an integer number (11595198825540).

Almost surely, 2^{138838631535501} is an apocalyptic number.

It is an amenable number.

138838631535501 is a deficient number, since it is larger than the sum of its proper divisors (46684549673139).

138838631535501 is a wasteful number, since it uses less digits than its factorization.

138838631535501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23799676.

The product of its (nonzero) digits is 31104000, while the sum is 60.

The spelling of 138838631535501 in words is "one hundred thirty-eight trillion, eight hundred thirty-eight billion, six hundred thirty-one million, five hundred thirty-five thousand, five hundred one".