999909910000 has 100 divisors (see below), whose sum is σ = 2563287135552. Its totient is φ = 376436608000.

The previous prime is 999909909961. The next prime is 999909910007. The reversal of 999909910000 is 19909999.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999909910007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2770912 + ... + 3110911.

Almost surely, 2^999909910000 is an apocalyptic number.

It is an amenable number.

999909910000 is an abundant number, since it is smaller than the sum of its proper divisors (1563377225552).

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

999909910000 is a wasteful number, since it uses less digits than its factorization.

999909910000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881868 (or 5881847 counting only the distinct ones).

The product of its (nonzero) digits is 531441, while the sum is 55.

The spelling of 999909910000 in words is "nine hundred ninety-nine billion, nine hundred nine million, nine hundred ten thousand".