128327438099 has 8 divisors (see below), whose sum is σ = 148848883968. Its totient is φ = 108353230920.

The previous prime is 128327438027. The next prime is 128327438119. The reversal of 128327438099 is 990834723821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128327438099 - 2²⁰ = 128326389523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128327435099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136809167 + ... + 136810104.

It is an arithmetic number, because the mean of its divisors is an integer number (18606110496).

Almost surely, 2^128327438099 is an apocalyptic number.

128327438099 is a deficient number, since it is larger than the sum of its proper divisors (20521445869).

128327438099 is an equidigital number, since it uses as much as digits as its factorization.

128327438099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273619345.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 128327438099 in words is "one hundred twenty-eight billion, three hundred twenty-seven million, four hundred thirty-eight thousand, ninety-nine".