90999099909 has 36 divisors (see below), whose sum is σ = 138798275616. Its totient is φ = 57442891824.

The previous prime is 90999099899. The next prime is 90999099929.

90999099909 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90999099909 - 2¹⁵ = 90999067141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90999099929) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 7281264 + ... + 7293750.

It is an arithmetic number, because the mean of its divisors is an integer number (3855507656).

Almost surely, 2^90999099909 is an apocalyptic number.

It is an amenable number.

90999099909 is a deficient number, since it is larger than the sum of its proper divisors (47799175707).

90999099909 is a wasteful number, since it uses less digits than its factorization.

90999099909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14774 (or 14752 counting only the distinct ones).

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

The spelling of 90999099909 in words is "ninety billion, nine hundred ninety-nine million, ninety-nine thousand, nine hundred nine".