11165031601 has 4 divisors (see below), whose sum is σ = 11165286132. Its totient is φ = 11164777072.

The previous prime is 11165031587. The next prime is 11165031623. The reversal of 11165031601 is 10613056111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4425442576 + 6739589025 = 66524^2 + 82095^2 .

It is a cyclic number.

It is not a de Polignac number, because 11165031601 - 2¹⁵ = 11164998833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11165031301) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 42766 + ... + 155431.

It is an arithmetic number, because the mean of its divisors is an integer number (2791321533).

Almost surely, 2^11165031601 is an apocalyptic number.

It is an amenable number.

11165031601 is a deficient number, since it is larger than the sum of its proper divisors (254531).

11165031601 is an equidigital number, since it uses as much as digits as its factorization.

11165031601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254530.

The product of its (nonzero) digits is 540, while the sum is 25.

Adding to 11165031601 its reverse (10613056111), we get a palindrome (21778087712).

The spelling of 11165031601 in words is "eleven billion, one hundred sixty-five million, thirty-one thousand, six hundred one".