9999280216 has 8 divisors (see below), whose sum is σ = 18748650420. Its totient is φ = 4999640104.

The previous prime is 9999280189. The next prime is 9999280217. The reversal of 9999280216 is 6120829999.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999280217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624955006 + ... + 624955021.

Almost surely, 2^9999280216 is an apocalyptic number.

It is an amenable number.

9999280216 is a deficient number, since it is larger than the sum of its proper divisors (8749370204).

9999280216 is a wasteful number, since it uses less digits than its factorization.

9999280216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249910033 (or 1249910029 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 9999280216 is about 99996.4010152365. The cubic root of 9999280216 is about 2154.3829978710.

The spelling of 9999280216 in words is "nine billion, nine hundred ninety-nine million, two hundred eighty thousand, two hundred sixteen".