99999000450 has 72 divisors (see below), whose sum is σ = 274912033968. Its totient is φ = 26046246240.

The previous prime is 99999000389. The next prime is 99999000469. The reversal of 99999000450 is 5400099999.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2564604 + ... + 2603303.

It is an arithmetic number, because the mean of its divisors is an integer number (3818222694).

Almost surely, 2^99999000450 is an apocalyptic number.

99999000450 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99999000450 is an abundant number, since it is smaller than the sum of its proper divisors (174913033518).

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

99999000450 is a wasteful number, since it uses less digits than its factorization.

99999000450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5167968 (or 5167960 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The spelling of 99999000450 in words is "ninety-nine billion, nine hundred ninety-nine million, four hundred fifty", and thus it is an aban number.