99998000000 has 112 divisors (see below), whose sum is σ = 249020250000. Its totient is φ = 39998400000.

The previous prime is 99997999979. The next prime is 99998000153. The reversal of 99998000000 is 89999.

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, 1975001 + ... + 2024999.

Almost surely, 2^99998000000 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 99998000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124510125000).

99998000000 is an abundant number, since it is smaller than the sum of its proper divisors (149022250000).

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

99998000000 is an frugal number, since it uses more digits than its factorization.

99998000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50043 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 44.

Adding to 99998000000 its reverse (89999), we get a palindrome (99998089999).

The spelling of 99998000000 in words is "ninety-nine billion, nine hundred ninety-eight million", and thus it is an aban number.