128427603113 has 18 divisors (see below), whose sum is σ = 142189117434. Its totient is φ = 115587093952.

The previous prime is 128427603107. The next prime is 128427603169. The reversal of 128427603113 is 311306724821.

It can be written as a sum of positive squares in only one way, i.e., 120873038224 + 7554564889 = 347668^2 + 86917^2 .

It is not a de Polignac number, because 128427603113 - 2¹⁰ = 128427602089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128427603193) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 33982658 + ... + 33986436.

It is an arithmetic number, because the mean of its divisors is an integer number (7899395413).

Almost surely, 2^128427603113 is an apocalyptic number.

It is an amenable number.

128427603113 is a deficient number, since it is larger than the sum of its proper divisors (13761514321).

128427603113 is an frugal number, since it uses more digits than its factorization.

128427603113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 128427603113 in words is "one hundred twenty-eight billion, four hundred twenty-seven million, six hundred three thousand, one hundred thirteen".