344128128191 has 8 divisors (see below), whose sum is σ = 367478313600. Its totient is φ = 321543522720.

The previous prime is 344128128181. The next prime is 344128128209. The reversal of 344128128191 is 191821821443.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-344128128191 is a prime.

It is a super-2 number, since 2×344128128191² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (344128128151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191394056 + ... + 191395853.

It is an arithmetic number, because the mean of its divisors is an integer number (45934789200).

Almost surely, 2^344128128191 is an apocalyptic number.

344128128191 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

344128128191 is a deficient number, since it is larger than the sum of its proper divisors (23350185409).

344128128191 is a wasteful number, since it uses less digits than its factorization.

344128128191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382789969.

The product of its digits is 110592, while the sum is 44.

The spelling of 344128128191 in words is "three hundred forty-four billion, one hundred twenty-eight million, one hundred twenty-eight thousand, one hundred ninety-one".