11155413165 has 32 divisors (see below), whose sum is σ = 19247281536. Its totient is φ = 5484568320.

The previous prime is 11155413131. The next prime is 11155413187. The reversal of 11155413165 is 56131455111.

It is not a de Polignac number, because 11155413165 - 2⁷ = 11155413037 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, 109830 + ... + 185400.

It is an arithmetic number, because the mean of its divisors is an integer number (601477548).

Almost surely, 2^11155413165 is an apocalyptic number.

11155413165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11155413165 is a deficient number, since it is larger than the sum of its proper divisors (8091868371).

11155413165 is a wasteful number, since it uses less digits than its factorization.

11155413165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76349.

The product of its digits is 9000, while the sum is 33.

Adding to 11155413165 its reverse (56131455111), we get a palindrome (67286868276).

The spelling of 11155413165 in words is "eleven billion, one hundred fifty-five million, four hundred thirteen thousand, one hundred sixty-five".