137728173212 has 48 divisors (see below), whose sum is σ = 287858188800. Its totient is φ = 56376420672.

The previous prime is 137728173211. The next prime is 137728173229. The reversal of 137728173212 is 212371827731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137728173211) 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, 278039 + ... + 593937.

It is an arithmetic number, because the mean of its divisors is an integer number (5997045600).

Almost surely, 2^137728173212 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 137728173212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143929094400).

137728173212 is an abundant number, since it is smaller than the sum of its proper divisors (150130015588).

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

137728173212 is a wasteful number, since it uses less digits than its factorization.

137728173212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316610 (or 316608 counting only the distinct ones).

The product of its digits is 197568, while the sum is 44.

The spelling of 137728173212 in words is "one hundred thirty-seven billion, seven hundred twenty-eight million, one hundred seventy-three thousand, two hundred twelve".