9931881128275 has 12 divisors (see below), whose sum is σ = 12315573940072. Its totient is φ = 7945478231040.

The previous prime is 9931881128249. The next prime is 9931881128311. The reversal of 9931881128275 is 5728211881399.

It is not a de Polignac number, because 9931881128275 - 2¹¹ = 9931881126227 is a prime.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10788499 + ... + 11672851.

Almost surely, 2^{9931881128275} is an apocalyptic number.

9931881128275 is a deficient number, since it is larger than the sum of its proper divisors (2383692811797).

9931881128275 is a wasteful number, since it uses less digits than its factorization.

9931881128275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333590 (or 1333585 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 64.

The spelling of 9931881128275 in words is "nine trillion, nine hundred thirty-one billion, eight hundred eighty-one million, one hundred twenty-eight thousand, two hundred seventy-five".