9979816756 has 24 divisors (see below), whose sum is σ = 21494990720. Its totient is φ = 3948059232.

The previous prime is 9979816753. The next prime is 9979816789. The reversal of 9979816756 is 6576189799.

It is a junction number, because it is equal to n+sod(n) for n = 9979816691 and 9979816700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979816751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13708176 + ... + 13708903.

Almost surely, 2^9979816756 is an apocalyptic number.

It is an amenable number.

9979816756 is an abundant number, since it is smaller than the sum of its proper divisors (11515173964).

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

9979816756 is a wasteful number, since it uses less digits than its factorization.

9979816756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27417103 (or 27417101 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 67.

The square root of 9979816756 is about 99899.0328081308. The cubic root of 9979816756 is about 2152.9842644163.

The spelling of 9979816756 in words is "nine billion, nine hundred seventy-nine million, eight hundred sixteen thousand, seven hundred fifty-six".