1105005561 has 16 divisors (see below), whose sum is σ = 1608595200. Its totient is φ = 669152720.

The previous prime is 1105005557. The next prime is 1105005581. The reversal of 1105005561 is 1655005011.

It is a cyclic number.

It is not a de Polignac number, because 1105005561 - 2² = 1105005557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1105005541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29290 + ... + 55388.

It is an arithmetic number, because the mean of its divisors is an integer number (100537200).

Almost surely, 2^1105005561 is an apocalyptic number.

1105005561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1105005561 is a deficient number, since it is larger than the sum of its proper divisors (503589639).

1105005561 is a wasteful number, since it uses less digits than its factorization.

1105005561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27396.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 1105005561 is about 33241.6239224259. The cubic root of 1105005561 is about 1033.8435467086.

The spelling of 1105005561 in words is "one billion, one hundred five million, five thousand, five hundred sixty-one".