99919900000 has 72 divisors (see below), whose sum is σ = 245881137600. Its totient is φ = 39967920000.

The previous prime is 99919899979. The next prime is 99919900021. The reversal of 99919900000 is 991999.

99919900000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (99919899979) and next prime (99919900021).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399600 + ... + 599599.

It is an arithmetic number, because the mean of its divisors is an integer number (3415015800).

Almost surely, 2^99919900000 is an apocalyptic number.

It is an amenable number.

99919900000 is an abundant number, since it is smaller than the sum of its proper divisors (145961237600).

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

99919900000 is an frugal number, since it uses more digits than its factorization.

99919900000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999234 (or 999206 counting only the distinct ones).

The product of its (nonzero) digits is 59049, while the sum is 46.

The spelling of 99919900000 in words is "ninety-nine billion, nine hundred nineteen million, nine hundred thousand".