99999500000 has 84 divisors (see below), whose sum is σ = 246090600000. Its totient is φ = 39999600000.

The previous prime is 99999499949. The next prime is 99999500011. The reversal of 99999500000 is 599999.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 400001 + ... + 599999.

It is an arithmetic number, because the mean of its divisors is an integer number (2929650000).

Almost surely, 2^99999500000 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 99999500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123045300000).

99999500000 is an abundant number, since it is smaller than the sum of its proper divisors (146091100000).

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

99999500000 is an frugal number, since it uses more digits than its factorization.

99999500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200039 (or 200006 counting only the distinct ones).

The product of its (nonzero) digits is 295245, while the sum is 50.

The spelling of 99999500000 in words is "ninety-nine billion, nine hundred ninety-nine million, five hundred thousand".