9661931524432 has 20 divisors (see below), whose sum is σ = 20421809813376. Its totient is φ = 4391787056480.

The previous prime is 9661931524423. The next prime is 9661931524457. The reversal of 9661931524432 is 2344251391669.

It is a happy number.

9661931524432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27448668928 + ... + 27448669279.

Almost surely, 2^{9661931524432} is an apocalyptic number.

It is an amenable number.

9661931524432 is an abundant number, since it is smaller than the sum of its proper divisors (10759878288944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9661931524432 is a wasteful number, since it uses less digits than its factorization.

9661931524432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54897338226 (or 54897338220 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 55.

The spelling of 9661931524432 in words is "nine trillion, six hundred sixty-one billion, nine hundred thirty-one million, five hundred twenty-four thousand, four hundred thirty-two".