138839702544 has 45 divisors (see below), whose sum is σ = 388570848159. Its totient is φ = 46278410400.

The previous prime is 138839702503. The next prime is 138839702567. The reversal of 138839702544 is 445207938831.

It is a happy number.

The square root of 138839702544 is 372612.

It is a perfect power (a square), and thus also a powerful number.

138839702544 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 3 + 97 + 0 + 2 + 544 = 666.

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 8 ways as a sum of consecutive naturals, for example, 4455819 + ... + 4486869.

Almost surely, 2^138839702544 is an apocalyptic number.

138839702544 is the 372612-nd square number.

It is an amenable number.

138839702544 is an abundant number, since it is smaller than the sum of its proper divisors (249731145615).

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

138839702544 is an frugal number, since it uses more digits than its factorization.

138839702544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62116 (or 31056 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 138839702544 in words is "one hundred thirty-eight billion, eight hundred thirty-nine million, seven hundred two thousand, five hundred forty-four".