11111223456789 has 8 divisors (see below), whose sum is σ = 15325825457760. Its totient is φ = 7152051880176.

The previous prime is 11111223456769. The next prime is 11111223456803. The reversal of 11111223456789 is 98765432211111.

It is a happy number.

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

It is not a de Polignac number, because 11111223456789 - 2⁷ = 11111223456661 is a prime.

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 (11111223456769) 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, 63857605987 + ... + 63857606160.

It is an arithmetic number, because the mean of its divisors is an integer number (1915728182220).

Almost surely, 2^{11111223456789} is an apocalyptic number.

It is an amenable number.

11111223456789 is a deficient number, since it is larger than the sum of its proper divisors (4214602000971).

11111223456789 is a wasteful number, since it uses less digits than its factorization.

11111223456789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127715212179.

The product of its digits is 725760, while the sum is 51.

The spelling of 11111223456789 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-three million, four hundred fifty-six thousand, seven hundred eighty-nine".