9978559860 has 48 divisors (see below), whose sum is σ = 27962871552. Its totient is φ = 2658768000.

The previous prime is 9978559793. The next prime is 9978559891. The reversal of 9978559860 is 689558799.

9978559860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9978559791 and 9978559800.

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 15 ways as a sum of consecutive naturals, for example, 6310 + ... + 141410.

It is an arithmetic number, because the mean of its divisors is an integer number (582559824).

Almost surely, 2^9978559860 is an apocalyptic number.

It is an amenable number.

9978559860 is an abundant number, since it is smaller than the sum of its proper divisors (17984311692).

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

9978559860 is a wasteful number, since it uses less digits than its factorization.

9978559860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136344 (or 136342 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 66.

The square root of 9978559860 is about 99892.7417783695. The cubic root of 9978559860 is about 2152.8938756183.

The spelling of 9978559860 in words is "nine billion, nine hundred seventy-eight million, five hundred fifty-nine thousand, eight hundred sixty".