11031065505 has 24 divisors (see below), whose sum is σ = 20126857920. Its totient is φ = 5573590560.

The previous prime is 11031065503. The next prime is 11031065531. The reversal of 11031065505 is 50556013011.

11031065505 is a `hidden beast` number, since 1 + 1 + 0 + 3 + 1 + 0 + 655 + 0 + 5 = 666.

It is not a de Polignac number, because 11031065505 - 2¹ = 11031065503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11031065503) 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 23 ways as a sum of consecutive naturals, for example, 6450061 + ... + 6451770.

It is an arithmetic number, because the mean of its divisors is an integer number (838619080).

Almost surely, 2^11031065505 is an apocalyptic number.

11031065505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11031065505 is a deficient number, since it is larger than the sum of its proper divisors (9095792415).

11031065505 is a wasteful number, since it uses less digits than its factorization.

11031065505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12901861 (or 12901858 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

Adding to 11031065505 its reverse (50556013011), we get a palindrome (61587078516).

The spelling of 11031065505 in words is "eleven billion, thirty-one million, sixty-five thousand, five hundred five".