128680559 has 16 divisors (see below), whose sum is σ = 155124480. Its totient is φ = 104276160.

The previous prime is 128680549. The next prime is 128680567. The reversal of 128680559 is 955086821.

It is a cyclic number.

It is not a de Polignac number, because 128680559 - 2⁴ = 128680543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128680529) 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, 107267 + ... + 108459.

It is an arithmetic number, because the mean of its divisors is an integer number (9695280).

Almost surely, 2^128680559 is an apocalyptic number.

128680559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128680559 is a deficient number, since it is larger than the sum of its proper divisors (26443921).

128680559 is a wasteful number, since it uses less digits than its factorization.

128680559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 128680559 is about 11343.7453691451. The cubic root of 128680559 is about 504.8600193667.

The spelling of 128680559 in words is "one hundred twenty-eight million, six hundred eighty thousand, five hundred fifty-nine".