9640921645212 has 96 divisors (see below), whose sum is σ = 26700717490944. Its totient is φ = 2668959590400.

The previous prime is 9640921645207. The next prime is 9640921645213. The reversal of 9640921645212 is 2125461290469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640921645213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28793614 + ... + 29126517.

It is an arithmetic number, because the mean of its divisors is an integer number (278132473864).

Almost surely, 2^{9640921645212} is an apocalyptic number.

It is an amenable number.

9640921645212 is an abundant number, since it is smaller than the sum of its proper divisors (17059795845732).

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

9640921645212 is a wasteful number, since it uses less digits than its factorization.

9640921645212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57920259 (or 57920257 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 9640921645212 in words is "nine trillion, six hundred forty billion, nine hundred twenty-one million, six hundred forty-five thousand, two hundred twelve".