128027948231 has 4 divisors (see below), whose sum is σ = 128029215000. Its totient is φ = 128026681464.

The previous prime is 128027948207. The next prime is 128027948299. The reversal of 128027948231 is 132849720821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128027948231 - 2¹⁴ = 128027931847 is a prime.

It is a super-2 number, since 2×128027948231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128027941231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467261 + ... + 688758.

It is an arithmetic number, because the mean of its divisors is an integer number (32007303750).

Almost surely, 2^128027948231 is an apocalyptic number.

128027948231 is a deficient number, since it is larger than the sum of its proper divisors (1266769).

128027948231 is a wasteful number, since it uses less digits than its factorization.

128027948231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266768.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 128027948231 in words is "one hundred twenty-eight billion, twenty-seven million, nine hundred forty-eight thousand, two hundred thirty-one".