9991716376 has 32 divisors (see below), whose sum is σ = 19386579600. Its totient is φ = 4822070400.

The previous prime is 9991716349. The next prime is 9991716421. The reversal of 9991716376 is 6736171999.

9991716376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×9991716376² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 9991716376.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1179211 + ... + 1187653.

Almost surely, 2^9991716376 is an apocalyptic number.

9991716376 is the 81616-th pentagonal number.

It is an amenable number.

9991716376 is a deficient number, since it is larger than the sum of its proper divisors (9394863224).

9991716376 is a wasteful number, since it uses less digits than its factorization.

9991716376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13579 (or 13575 counting only the distinct ones).

The product of its digits is 3857868, while the sum is 58.

The square root of 9991716376 is about 99958.5732991423. The cubic root of 9991716376 is about 2153.8396414662.

The spelling of 9991716376 in words is "nine billion, nine hundred ninety-one million, seven hundred sixteen thousand, three hundred seventy-six".