1234445678889 has 8 divisors (see below), whose sum is σ = 1645933193952. Its totient is φ = 822960974880.

The previous prime is 1234445678839. The next prime is 1234445678929. The reversal of 1234445678889 is 9888765444321.

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

It is not a de Polignac number, because 1234445678889 - 2¹⁶ = 1234445613353 is a prime.

It is a super-2 number, since 2×1234445678889² (a number of 25 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1234445678839) 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, 752262 + ... + 1742064.

It is an arithmetic number, because the mean of its divisors is an integer number (205741649244).

Almost surely, 2^{1234445678889} is an apocalyptic number.

It is an amenable number.

1234445678889 is a deficient number, since it is larger than the sum of its proper divisors (411487515063).

1234445678889 is an equidigital number, since it uses as much as digits as its factorization.

1234445678889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405527.

The product of its digits is 371589120, while the sum is 69.

The spelling of 1234445678889 in words is "one trillion, two hundred thirty-four billion, four hundred forty-five million, six hundred seventy-eight thousand, eight hundred eighty-nine".