11543165165 has 32 divisors (see below), whose sum is σ = 16111146240. Its totient is φ = 7776198144.

The previous prime is 11543165147. The next prime is 11543165197. The reversal of 11543165165 is 56156134511.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11543165165 - 2⁸ = 11543164909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 477254 + ... + 500856.

It is an arithmetic number, because the mean of its divisors is an integer number (503473320).

Almost surely, 2^11543165165 is an apocalyptic number.

It is an amenable number.

11543165165 is a deficient number, since it is larger than the sum of its proper divisors (4567981075).

11543165165 is a wasteful number, since it uses less digits than its factorization.

11543165165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23861.

The product of its digits is 54000, while the sum is 38.

Adding to 11543165165 its reverse (56156134511), we get a palindrome (67699299676).

The spelling of 11543165165 in words is "eleven billion, five hundred forty-three million, one hundred sixty-five thousand, one hundred sixty-five".