11165511041645 has 4 divisors (see below), whose sum is σ = 13398613249980. Its totient is φ = 8932408833312.

The previous prime is 11165511041639. The next prime is 11165511041689. The reversal of 11165511041645 is 54614011556111.

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 1444796788009 + 9720714253636 = 1201997^2 + 3117806^2 .

It is a cyclic number.

It is not a de Polignac number, because 11165511041645 - 2²⁰ = 11165509993069 is a prime.

It is a super-3 number, since 3×11165511041645³ (a number of 40 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116551104160 + ... + 1116551104169.

It is an arithmetic number, because the mean of its divisors is an integer number (3349653312495).

Almost surely, 2^{11165511041645} is an apocalyptic number.

It is an amenable number.

11165511041645 is a deficient number, since it is larger than the sum of its proper divisors (2233102208335).

11165511041645 is an equidigital number, since it uses as much as digits as its factorization.

11165511041645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233102208334.

The product of its (nonzero) digits is 72000, while the sum is 41.

Adding to 11165511041645 its reverse (54614011556111), we get a palindrome (65779522597756).

The spelling of 11165511041645 in words is "eleven trillion, one hundred sixty-five billion, five hundred eleven million, forty-one thousand, six hundred forty-five".