999900000100 has 18 divisors (see below), whose sum is σ = 2169783000434. Its totient is φ = 399960000000.

The previous prime is 999900000091. The next prime is 999900000107. The reversal of 999900000100 is 1000009999.

It can be written as a sum of positive squares in 3 ways, for example, as 166155694884 + 833744305216 = 407622^2 + 913096^2 .

It is not an unprimeable number, because it can be changed into a prime (999900000107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4999499901 + ... + 4999500100.

Almost surely, 2^999900000100 is an apocalyptic number.

It is an amenable number.

999900000100 is an abundant number, since it is smaller than the sum of its proper divisors (1169883000334).

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

999900000100 is a wasteful number, since it uses less digits than its factorization.

999900000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999000015 (or 9999000008 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 37.

The spelling of 999900000100 in words is "nine hundred ninety-nine billion, nine hundred million, one hundred", and thus it is an aban number.