99999991002 has 32 divisors (see below), whose sum is σ = 201284487360. Its totient is φ = 33119873280.

The previous prime is 99999990989. The next prime is 99999991033. The reversal of 99999991002 is 20019999999.

It is an unprimeable number.

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, 562524 + ... + 718632.

It is an arithmetic number, because the mean of its divisors is an integer number (6290140230).

Almost surely, 2^99999991002 is an apocalyptic number.

99999991002 is an abundant number, since it is smaller than the sum of its proper divisors (101284496358).

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

99999991002 is a wasteful number, since it uses less digits than its factorization.

99999991002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156798.

The product of its (nonzero) digits is 9565938, while the sum is 66.

The spelling of 99999991002 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, two".