1105557009 has 16 divisors (see below), whose sum is σ = 1567030080. Its totient is φ = 691329600.

The previous prime is 1105557007. The next prime is 1105557029. The reversal of 1105557009 is 9007555011.

It is not a de Polignac number, because 1105557009 - 2¹ = 1105557007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1105557007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90262 + ... + 101775.

It is an arithmetic number, because the mean of its divisors is an integer number (97939380).

Almost surely, 2^1105557009 is an apocalyptic number.

1105557009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1105557009 is a deficient number, since it is larger than the sum of its proper divisors (461473071).

1105557009 is a wasteful number, since it uses less digits than its factorization.

1105557009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192160.

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 1105557009 is about 33249.9174284689. The cubic root of 1105557009 is about 1034.0154964150.

The spelling of 1105557009 in words is "one billion, one hundred five million, five hundred fifty-seven thousand, nine".