13446778889 has 8 divisors (see below), whose sum is σ = 13622818560. Its totient is φ = 13270885056.

The previous prime is 13446778879. The next prime is 13446778901. The reversal of 13446778889 is 98887764431.

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 13446778889 - 2²⁸ = 13178343433 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (13446778879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155732 + ... + 226154.

It is an arithmetic number, because the mean of its divisors is an integer number (1702852320).

Almost surely, 2^13446778889 is an apocalyptic number.

It is an amenable number.

13446778889 is a deficient number, since it is larger than the sum of its proper divisors (176039671).

13446778889 is an equidigital number, since it uses as much as digits as its factorization.

13446778889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72919.

The product of its digits is 65028096, while the sum is 65.

The spelling of 13446778889 in words is "thirteen billion, four hundred forty-six million, seven hundred seventy-eight thousand, eight hundred eighty-nine".