9921790116 has 72 divisors (see below), whose sum is σ = 29724560320. Its totient is φ = 2834795232.

The previous prime is 9921790027. The next prime is 9921790141. The reversal of 9921790116 is 6110971299.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 722311 + ... + 735918.

Almost surely, 2^9921790116 is an apocalyptic number.

It is an amenable number.

9921790116 is an abundant number, since it is smaller than the sum of its proper divisors (19802770204).

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

9921790116 is a wasteful number, since it uses less digits than its factorization.

9921790116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458255 (or 1458241 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 45.

The square root of 9921790116 is about 99608.1829771028. The cubic root of 9921790116 is about 2148.8033807084.

The spelling of 9921790116 in words is "nine billion, nine hundred twenty-one million, seven hundred ninety thousand, one hundred sixteen".