9979203662272 has 112 divisors (see below), whose sum is σ = 21923737500672. Its totient is φ = 4477935283200.

The previous prime is 9979203662251. The next prime is 9979203662279. The reversal of 9979203662272 is 2722663029799.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979203662279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5059683 + ... + 6749725.

It is an arithmetic number, because the mean of its divisors is an integer number (195747656256).

Almost surely, 2^{9979203662272} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9979203662272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10961868750336).

9979203662272 is an abundant number, since it is smaller than the sum of its proper divisors (11944533838400).

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

9979203662272 is a wasteful number, since it uses less digits than its factorization.

9979203662272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690266 (or 1690256 counting only the distinct ones).

The product of its (nonzero) digits is 61725888, while the sum is 64.

The spelling of 9979203662272 in words is "nine trillion, nine hundred seventy-nine billion, two hundred three million, six hundred sixty-two thousand, two hundred seventy-two".