11689144489 has 16 divisors (see below), whose sum is σ = 13438457280. Its totient is φ = 10055568960.

The previous prime is 11689144483. The next prime is 11689144543. The reversal of 11689144489 is 98444198611.

It is a cyclic number.

It is not a de Polignac number, because 11689144489 - 2¹⁷ = 11689013417 is a prime.

It is a super-2 number, since 2×11689144489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11689144483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151407 + ... + 215179.

It is an arithmetic number, because the mean of its divisors is an integer number (839903580).

Almost surely, 2^11689144489 is an apocalyptic number.

11689144489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11689144489 is a deficient number, since it is larger than the sum of its proper divisors (1749312791).

11689144489 is a wasteful number, since it uses less digits than its factorization.

11689144489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64680.

The product of its digits is 1990656, while the sum is 55.

The spelling of 11689144489 in words is "eleven billion, six hundred eighty-nine million, one hundred forty-four thousand, four hundred eighty-nine".