99900900900999 has 96 divisors (see below), whose sum is σ = 161220212834304. Its totient is φ = 59107051261440.

The previous prime is 99900900900979. The next prime is 99900900901027.

99900900900999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99900900900999 - 2⁵ = 99900900900967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99900900900949) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 203072307 + ... + 203563659.

It is an arithmetic number, because the mean of its divisors is an integer number (1679377217024).

Almost surely, 2^{99900900900999} is an apocalyptic number.

99900900900999 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99900900900999 is a deficient number, since it is larger than the sum of its proper divisors (61319311933305).

99900900900999 is a wasteful number, since it uses less digits than its factorization.

99900900900999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491757 (or 491754 counting only the distinct ones).

The product of its (nonzero) digits is 43046721, while the sum is 72.

The spelling of 99900900900999 in words is "ninety-nine trillion, nine hundred billion, nine hundred million, nine hundred thousand, nine hundred ninety-nine".