99010000000 has 128 divisors (see below), whose sum is σ = 246582376560. Its totient is φ = 39600000000.

The previous prime is 99009999983. The next prime is 99010000013. The reversal of 99010000000 is 1099.

It can be written as a sum of positive squares in 8 ways, for example, as 69202668096 + 29807331904 = 263064^2 + 172648^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9995050 + ... + 10004950.

Almost surely, 2^99010000000 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 99010000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123291188280).

99010000000 is an abundant number, since it is smaller than the sum of its proper divisors (147572376560).

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

99010000000 is an frugal number, since it uses more digits than its factorization.

99010000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9950 (or 9908 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 19.

Adding to 99010000000 its reverse (1099), we get a palindrome (99010001099).

The spelling of 99010000000 in words is "ninety-nine billion, ten million", and thus it is an aban number and an uban number.