990199118911 has 8 divisors (see below), whose sum is σ = 999555330384. Its totient is φ = 980844796800.

The previous prime is 990199118903. The next prime is 990199118921. The reversal of 990199118911 is 119811991099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 990199118911 - 2³ = 990199118903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990199118921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592071 + ... + 1526743.

It is an arithmetic number, because the mean of its divisors is an integer number (124944416298).

Almost surely, 2^990199118911 is an apocalyptic number.

990199118911 is a deficient number, since it is larger than the sum of its proper divisors (9356211473).

990199118911 is a wasteful number, since it uses less digits than its factorization.

990199118911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944681.

The product of its (nonzero) digits is 472392, while the sum is 58.

The spelling of 990199118911 in words is "nine hundred ninety billion, one hundred ninety-nine million, one hundred eighteen thousand, nine hundred eleven".