128681505271 has 16 divisors (see below), whose sum is σ = 140816056320. Its totient is φ = 116620146720.

The previous prime is 128681505247. The next prime is 128681505299. The reversal of 128681505271 is 172505186821.

It is not a de Polignac number, because 128681505271 - 2¹⁵ = 128681472503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128601505271) 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, 5636746 + ... + 5659528.

It is an arithmetic number, because the mean of its divisors is an integer number (8801003520).

Almost surely, 2^128681505271 is an apocalyptic number.

128681505271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128681505271 is a deficient number, since it is larger than the sum of its proper divisors (12134551049).

128681505271 is a wasteful number, since it uses less digits than its factorization.

128681505271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24366.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 128681505271 in words is "one hundred twenty-eight billion, six hundred eighty-one million, five hundred five thousand, two hundred seventy-one".