11005551109 has 8 divisors (see below), whose sum is σ = 12630401280. Its totient is φ = 9393858096.

The previous prime is 11005551097. The next prime is 11005551187. The reversal of 11005551109 is 90115550011.

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

It is not a de Polignac number, because 11005551109 - 2³¹ = 8858067461 is a prime.

It is a super-2 number, since 2×11005551109² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11005551199) 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, 3287494 + ... + 3290839.

It is an arithmetic number, because the mean of its divisors is an integer number (1578800160).

Almost surely, 2^11005551109 is an apocalyptic number.

It is an amenable number.

11005551109 is a deficient number, since it is larger than the sum of its proper divisors (1624850171).

11005551109 is an equidigital number, since it uses as much as digits as its factorization.

11005551109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578579.

The product of its (nonzero) digits is 1125, while the sum is 28.

The spelling of 11005551109 in words is "eleven billion, five million, five hundred fifty-one thousand, one hundred nine".