99910090000 has 200 divisors, whose sum is σ = 278239784768. Its totient is φ = 34032960000.

The previous prime is 99910089997. The next prime is 99910090019. The reversal of 99910090000 is 9001999.

It is a tau number, because it is divible by the number of its divisors (200).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10985455 + ... + 10994545.

Almost surely, 2^99910090000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99910090000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139119892384).

99910090000 is an abundant number, since it is smaller than the sum of its proper divisors (178329694768).

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

99910090000 is a wasteful number, since it uses less digits than its factorization.

99910090000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9283 (or 9262 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 37.

Adding to 99910090000 its reverse (9001999), we get a palindrome (99919091999).

The spelling of 99910090000 in words is "ninety-nine billion, nine hundred ten million, ninety thousand".