It is a harmonic number, since the harmonic mean of its divisors is an integer.
It is a nialpdrome in base 2.
It is a zygodrome in base 2.
It is a congruent number.
Almost surely, 2137438691328 is an apocalyptic number.
137438691328 is the 174763-rd centered nonagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 137438691328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137438691328).
137438691328 is a perfect number, since it is equal to the sum of its proper divisors.
137438691328 is an frugal number, since it uses more digits than its factorization.
137438691328 is an odious number, because the sum of its binary digits is odd.
The spelling of 137438691328 in words is "one hundred thirty-seven billion, four hundred thirty-eight million, six hundred ninety-one thousand, three hundred twenty-eight".