128317218326 has 16 divisors (see below), whose sum is σ = 210298187520. Its totient is φ = 58235853480.

The previous prime is 128317218301. The next prime is 128317218397. The reversal of 128317218326 is 623812713821.

It is a congruent number.

It is an unprimeable number.

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, 4493186 + ... + 4521653.

It is an arithmetic number, because the mean of its divisors is an integer number (13143636720).

Almost surely, 2^128317218326 is an apocalyptic number.

128317218326 is a deficient number, since it is larger than the sum of its proper divisors (81980969194).

128317218326 is a wasteful number, since it uses less digits than its factorization.

128317218326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9015499.

The product of its digits is 193536, while the sum is 44.

It can be divided in two parts, 128317 and 218326, that added together give a palindrome (346643).

The spelling of 128317218326 in words is "one hundred twenty-eight billion, three hundred seventeen million, two hundred eighteen thousand, three hundred twenty-six".