9909425509775 has 96 divisors (see below), whose sum is σ = 13884922022400. Its totient is φ = 6952208832000.

The previous prime is 9909425509769. The next prime is 9909425509783. The reversal of 9909425509775 is 5779055249099.

9909425509775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3147924²-1.

It is not a de Polignac number, because 9909425509775 - 2⁸ = 9909425509519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9909425509699 and 9909425509708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 865673102 + ... + 865684548.

It is an arithmetic number, because the mean of its divisors is an integer number (144634604400).

Almost surely, 2^{9909425509775} is an apocalyptic number.

9909425509775 is a deficient number, since it is larger than the sum of its proper divisors (3975496512625).

9909425509775 is a wasteful number, since it uses less digits than its factorization.

9909425509775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12225 (or 12220 counting only the distinct ones).

The product of its (nonzero) digits is 321489000, while the sum is 71.

The spelling of 9909425509775 in words is "nine trillion, nine hundred nine billion, four hundred twenty-five million, five hundred nine thousand, seven hundred seventy-five".