128757257329 has 16 divisors (see below), whose sum is σ = 134879044608. Its totient is φ = 122679632592.

The previous prime is 128757257327. The next prime is 128757257341. The reversal of 128757257329 is 923752757821.

It is a cyclic number.

It is not a de Polignac number, because 128757257329 - 2¹ = 128757257327 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128757257323) 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, 13178004 + ... + 13187770.

It is an arithmetic number, because the mean of its divisors is an integer number (8429940288).

Almost surely, 2^128757257329 is an apocalyptic number.

It is an amenable number.

128757257329 is a deficient number, since it is larger than the sum of its proper divisors (6121787279).

128757257329 is a wasteful number, since it uses less digits than its factorization.

128757257329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964.

The product of its digits is 14817600, while the sum is 58.

The spelling of 128757257329 in words is "one hundred twenty-eight billion, seven hundred fifty-seven million, two hundred fifty-seven thousand, three hundred twenty-nine".