138864728672 has 24 divisors (see below), whose sum is σ = 273404773656. Its totient is φ = 69428595712.

The previous prime is 138864728669. The next prime is 138864728719. The reversal of 138864728672 is 276827468831.

It is a super-3 number, since 3×138864728672³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537008 + ... + 752400.

It is an arithmetic number, because the mean of its divisors is an integer number (11391865569).

Almost surely, 2^138864728672 is an apocalyptic number.

It is an amenable number.

138864728672 is a deficient number, since it is larger than the sum of its proper divisors (134540044984).

138864728672 is a wasteful number, since it uses less digits than its factorization.

138864728672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235550 (or 235542 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 62.

The spelling of 138864728672 in words is "one hundred thirty-eight billion, eight hundred sixty-four million, seven hundred twenty-eight thousand, six hundred seventy-two".