128337475809 has 16 divisors (see below), whose sum is σ = 172311249600. Its totient is φ = 84961318080.

The previous prime is 128337475801. The next prime is 128337475837. The reversal of 128337475809 is 908574733821.

It is not a de Polignac number, because 128337475809 - 2³ = 128337475801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128337475801) 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, 1720639 + ... + 1793675.

It is an arithmetic number, because the mean of its divisors is an integer number (10769453100).

Almost surely, 2^128337475809 is an apocalyptic number.

It is an amenable number.

128337475809 is a deficient number, since it is larger than the sum of its proper divisors (43973773791).

128337475809 is a wasteful number, since it uses less digits than its factorization.

128337475809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77120.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 128337475809 in words is "one hundred twenty-eight billion, three hundred thirty-seven million, four hundred seventy-five thousand, eight hundred nine".