11708137728 has 216 divisors, whose sum is σ = 40850304768. Its totient is φ = 3148333056.

The previous prime is 11708137709. The next prime is 11708137733. The reversal of 11708137728 is 82773180711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252825 + ... + 295527.

Almost surely, 2^11708137728 is an apocalyptic number.

11708137728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11708137728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20425152384).

11708137728 is an abundant number, since it is smaller than the sum of its proper divisors (29142167040).

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

11708137728 is a wasteful number, since it uses less digits than its factorization.

11708137728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42749 (or 42732 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 45.

The spelling of 11708137728 in words is "eleven billion, seven hundred eight million, one hundred thirty-seven thousand, seven hundred twenty-eight".