11217489165 has 48 divisors (see below), whose sum is σ = 20097642240. Its totient is φ = 5784762240.

The previous prime is 11217489121. The next prime is 11217489169. The reversal of 11217489165 is 56198471211.

11217489165 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 7 + 489 + 165 = 666.

11217489165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11217489165 - 2¹⁰ = 11217488141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11217489165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217489169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 127324 + ... + 196586.

It is an arithmetic number, because the mean of its divisors is an integer number (418700880).

Almost surely, 2^11217489165 is an apocalyptic number.

11217489165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11217489165 is a deficient number, since it is larger than the sum of its proper divisors (8880153075).

11217489165 is a wasteful number, since it uses less digits than its factorization.

11217489165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69394 (or 69391 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The spelling of 11217489165 in words is "eleven billion, two hundred seventeen million, four hundred eighty-nine thousand, one hundred sixty-five".