128508071736 has 64 divisors (see below), whose sum is σ = 359948926080. Its totient is φ = 37889354880.

The previous prime is 128508071723. The next prime is 128508071759. The reversal of 128508071736 is 637170805821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6568246 + ... + 6587781.

It is an arithmetic number, because the mean of its divisors is an integer number (5624201970).

Almost surely, 2^128508071736 is an apocalyptic number.

It is an amenable number.

128508071736 is an abundant number, since it is smaller than the sum of its proper divisors (231440854344).

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

128508071736 is a wasteful number, since it uses less digits than its factorization.

128508071736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13156084 (or 13156080 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 128508071736 in words is "one hundred twenty-eight billion, five hundred eight million, seventy-one thousand, seven hundred thirty-six".