12345567789 has 4 divisors (see below), whose sum is σ = 16460757056. Its totient is φ = 8230378524.

The previous prime is 12345567781. The next prime is 12345567797. The reversal of 12345567789 is 98776554321.

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.

It is an interprime number because it is at equal distance from previous prime (12345567781) and next prime (12345567797).

It is not a de Polignac number, because 12345567789 - 2³ = 12345567781 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345567781) 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, 2057594629 + ... + 2057594634.

It is an arithmetic number, because the mean of its divisors is an integer number (4115189264).

Almost surely, 2^12345567789 is an apocalyptic number.

It is an amenable number.

12345567789 is a deficient number, since it is larger than the sum of its proper divisors (4115189267).

12345567789 is an equidigital number, since it uses as much as digits as its factorization.

12345567789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115189266.

The product of its digits is 12700800, while the sum is 57.

The spelling of 12345567789 in words is "twelve billion, three hundred forty-five million, five hundred sixty-seven thousand, seven hundred eighty-nine".