99208010991 has 16 divisors (see below), whose sum is σ = 133304105088. Its totient is φ = 65625424800.

The previous prime is 99208010987. The next prime is 99208010999. The reversal of 99208010991 is 19901080299.

It is not a de Polignac number, because 99208010991 - 2² = 99208010987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99208010991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99208010999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5287096 + ... + 5305826.

It is an arithmetic number, because the mean of its divisors is an integer number (8331506568).

Almost surely, 2^99208010991 is an apocalyptic number.

99208010991 is a deficient number, since it is larger than the sum of its proper divisors (34096094097).

99208010991 is a wasteful number, since it uses less digits than its factorization.

99208010991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32342.

The product of its (nonzero) digits is 104976, while the sum is 48.

The spelling of 99208010991 in words is "ninety-nine billion, two hundred eight million, ten thousand, nine hundred ninety-one".