9979686880 has 24 divisors (see below), whose sum is σ = 23577010632. Its totient is φ = 3991874688.

The previous prime is 9979686859. The next prime is 9979686907. The reversal of 9979686880 is 886869799.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 31186362 + ... + 31186681.

It is an arithmetic number, because the mean of its divisors is an integer number (982375443).

Almost surely, 2^9979686880 is an apocalyptic number.

It is an amenable number.

9979686880 is an abundant number, since it is smaller than the sum of its proper divisors (13597323752).

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

9979686880 is a wasteful number, since it uses less digits than its factorization.

9979686880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62373058 (or 62373050 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 70.

The square root of 9979686880 is about 99898.3827696925. The cubic root of 9979686880 is about 2152.9749248260.

The spelling of 9979686880 in words is "nine billion, nine hundred seventy-nine million, six hundred eighty-six thousand, eight hundred eighty".