10991099109 has 8 divisors (see below), whose sum is σ = 14665847680. Its totient is φ = 7321874976.

The previous prime is 10991099101. The next prime is 10991099113. The reversal of 10991099109 is 90199019901.

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

It is not a de Polignac number, because 10991099109 - 2³ = 10991099101 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 (10991099101) 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, 1376464 + ... + 1384425.

It is an arithmetic number, because the mean of its divisors is an integer number (1833230960).

Almost surely, 2^10991099109 is an apocalyptic number.

It is an amenable number.

10991099109 is a deficient number, since it is larger than the sum of its proper divisors (3674748571).

10991099109 is a wasteful number, since it uses less digits than its factorization.

10991099109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762219.

The product of its (nonzero) digits is 59049, while the sum is 48.

The spelling of 10991099109 in words is "ten billion, nine hundred ninety-one million, ninety-nine thousand, one hundred nine".