9902620866648 has 64 divisors (see below), whose sum is σ = 24805281231360. Its totient is φ = 3294380658816.

The previous prime is 9902620866641. The next prime is 9902620866667. The reversal of 9902620866648 is 8466680262099.

It is a Cunningham number, because it is equal to 3146843²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9902620866641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37630986 + ... + 37893222.

It is an arithmetic number, because the mean of its divisors is an integer number (387582519240).

Almost surely, 2^{9902620866648} is an apocalyptic number.

It is an amenable number.

9902620866648 is an abundant number, since it is smaller than the sum of its proper divisors (14902660364712).

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

9902620866648 is a wasteful number, since it uses less digits than its factorization.

9902620866648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265336 (or 265332 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 66.

The spelling of 9902620866648 in words is "nine trillion, nine hundred two billion, six hundred twenty million, eight hundred sixty-six thousand, six hundred forty-eight".