1161166055 has 16 divisors (see below), whose sum is σ = 1595083584. Its totient is φ = 794914560.

The previous prime is 1161166031. The next prime is 1161166081. The reversal of 1161166055 is 5506611611.

It is not a de Polignac number, because 1161166055 - 2¹⁶ = 1161100519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5606 + ... + 48515.

It is an arithmetic number, because the mean of its divisors is an integer number (99692724).

Almost surely, 2^1161166055 is an apocalyptic number.

1161166055 is a deficient number, since it is larger than the sum of its proper divisors (433917529).

1161166055 is an equidigital number, since it uses as much as digits as its factorization.

1161166055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54746.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1161166055 is about 34075.8867089325. The cubic root of 1161166055 is about 1051.0695239757.

Adding to 1161166055 its reverse (5506611611), we get a palindrome (6667777666).

The spelling of 1161166055 in words is "one billion, one hundred sixty-one million, one hundred sixty-six thousand, fifty-five".