128016559 has 12 divisors (see below), whose sum is σ = 143547768. Its totient is φ = 113220000.

The previous prime is 128016541. The next prime is 128016569. The reversal of 128016559 is 955610821.

It is not a de Polignac number, because 128016559 - 2¹³ = 128008367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128016569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10809 + ... + 19309.

It is an arithmetic number, because the mean of its divisors is an integer number (11962314).

Almost surely, 2^128016559 is an apocalyptic number.

128016559 is a deficient number, since it is larger than the sum of its proper divisors (15531209).

128016559 is an equidigital number, since it uses as much as digits as its factorization.

128016559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8586 (or 8549 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 128016559 is about 11314.4402866426. The cubic root of 128016559 is about 503.9901513466.

The spelling of 128016559 in words is "one hundred twenty-eight million, sixteen thousand, five hundred fifty-nine".