13119778689 has 4 divisors (see below), whose sum is σ = 17493038256. Its totient is φ = 8746519124.

The previous prime is 13119778667. The next prime is 13119778717. The reversal of 13119778689 is 98687791131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98687791131 = 3 ⋅32895930377.

It is a cyclic number.

It is not a de Polignac number, because 13119778689 - 2⁸ = 13119778433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13119738689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2186629779 + ... + 2186629784.

It is an arithmetic number, because the mean of its divisors is an integer number (4373259564).

Almost surely, 2^13119778689 is an apocalyptic number.

It is an amenable number.

13119778689 is a deficient number, since it is larger than the sum of its proper divisors (4373259567).

13119778689 is an equidigital number, since it uses as much as digits as its factorization.

13119778689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373259566.

The product of its digits is 4572288, while the sum is 60.

The spelling of 13119778689 in words is "thirteen billion, one hundred nineteen million, seven hundred seventy-eight thousand, six hundred eighty-nine".