9928964987856 has 120 divisors (see below), whose sum is σ = 29380968664320. Its totient is φ = 3121402065408.

The previous prime is 9928964987839. The next prime is 9928964988001. The reversal of 9928964987856 is 6587894698299.

9928964987856 is a `hidden beast` number, since 9 + 9 + 28 + 96 + 498 + 7 + 8 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7526661 + ... + 8746916.

It is an arithmetic number, because the mean of its divisors is an integer number (244841405536).

Almost surely, 2^{9928964987856} is an apocalyptic number.

It is an amenable number.

9928964987856 is an abundant number, since it is smaller than the sum of its proper divisors (19452003676464).

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

9928964987856 is a wasteful number, since it uses less digits than its factorization.

9928964987856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16273833 (or 16273824 counting only the distinct ones).

The product of its digits is 33861058560, while the sum is 90.

The spelling of 9928964987856 in words is "nine trillion, nine hundred twenty-eight billion, nine hundred sixty-four million, nine hundred eighty-seven thousand, eight hundred fifty-six".