13185778489 has 8 divisors (see below), whose sum is σ = 14440749120. Its totient is φ = 11965190736.

The previous prime is 13185778453. The next prime is 13185778511. The reversal of 13185778489 is 98487758131.

13185778489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13185778489 - 2⁹ = 13185777977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13185778189) 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, 8594917 + ... + 8596450.

It is an arithmetic number, because the mean of its divisors is an integer number (1805093640).

Almost surely, 2^13185778489 is an apocalyptic number.

It is an amenable number.

13185778489 is a deficient number, since it is larger than the sum of its proper divisors (1254970631).

13185778489 is a wasteful number, since it uses less digits than its factorization.

13185778489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17191439.

The product of its digits is 13547520, while the sum is 61.

The spelling of 13185778489 in words is "thirteen billion, one hundred eighty-five million, seven hundred seventy-eight thousand, four hundred eighty-nine".