128444442118 has 4 divisors (see below), whose sum is σ = 192666663180. Its totient is φ = 64222221058.

The previous prime is 128444442109. The next prime is 128444442167. The reversal of 128444442118 is 811244444821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 811244444821 = 431 ⋅1882237691.

It is a super-2 number, since 2×128444442118² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32111110528 + ... + 32111110531.

It is an arithmetic number, because the mean of its divisors is an integer number (48166665795).

Almost surely, 2^128444442118 is an apocalyptic number.

128444442118 is a deficient number, since it is larger than the sum of its proper divisors (64222221062).

128444442118 is an equidigital number, since it uses as much as digits as its factorization.

128444442118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64222221061.

The product of its digits is 262144, while the sum is 43.

Adding to 128444442118 its reverse (811244444821), we get a palindrome (939688886939).

The spelling of 128444442118 in words is "one hundred twenty-eight billion, four hundred forty-four million, four hundred forty-two thousand, one hundred eighteen".