11665801589 has 8 divisors (see below), whose sum is σ = 12769125432. Its totient is φ = 10591899840.

The previous prime is 11665801529. The next prime is 11665801619. The reversal of 11665801589 is 98510856611.

11665801589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 247810564 + 11417991025 = 15742^2 + 106855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11665801589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11665801529) 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 7 ways as a sum of consecutive naturals, for example, 7354694 + ... + 7356279.

It is an arithmetic number, because the mean of its divisors is an integer number (1596140679).

Almost surely, 2^11665801589 is an apocalyptic number.

It is an amenable number.

11665801589 is a deficient number, since it is larger than the sum of its proper divisors (1103323843).

11665801589 is a wasteful number, since it uses less digits than its factorization.

11665801589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14711047.

The product of its (nonzero) digits is 518400, while the sum is 50.

The spelling of 11665801589 in words is "eleven billion, six hundred sixty-five million, eight hundred one thousand, five hundred eighty-nine".