12345578889 has 16 divisors (see below), whose sum is σ = 18830042112. Its totient is φ = 7047967248.

The previous prime is 12345578851. The next prime is 12345578897. The reversal of 12345578889 is 98887554321.

It is not a de Polignac number, because 12345578889 - 2²⁵ = 12312024457 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12345574889) 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, 254199 + ... + 298844.

It is an arithmetic number, because the mean of its divisors is an integer number (1176877632).

Almost surely, 2^12345578889 is an apocalyptic number.

It is an amenable number.

12345578889 is a deficient number, since it is larger than the sum of its proper divisors (6484463223).

12345578889 is a wasteful number, since it uses less digits than its factorization.

12345578889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554116.

The product of its digits is 19353600, while the sum is 60.

The spelling of 12345578889 in words is "twelve billion, three hundred forty-five million, five hundred seventy-eight thousand, eight hundred eighty-nine".