11111555105 has 8 divisors (see below), whose sum is σ = 15238704192. Its totient is φ = 7619352048.

The previous prime is 11111555089. The next prime is 11111555107. The reversal of 11111555105 is 50155511111.

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

It is not a de Polignac number, because 11111555105 - 2⁴ = 11111555089 is a prime.

It is a super-2 number, since 2×11111555105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11111555107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158736467 + ... + 158736536.

It is an arithmetic number, because the mean of its divisors is an integer number (1904838024).

Almost surely, 2^11111555105 is an apocalyptic number.

It is an amenable number.

11111555105 is a deficient number, since it is larger than the sum of its proper divisors (4127149087).

11111555105 is an equidigital number, since it uses as much as digits as its factorization.

11111555105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317473015.

The product of its (nonzero) digits is 625, while the sum is 26.

The spelling of 11111555105 in words is "eleven billion, one hundred eleven million, five hundred fifty-five thousand, one hundred five".