128913857326 has 32 divisors (see below), whose sum is σ = 209593565280. Its totient is φ = 59230058496.

The previous prime is 128913857273. The next prime is 128913857327. The reversal of 128913857326 is 623758319821.

128913857326 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128913857326² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128913857327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3797460 + ... + 3831256.

It is an arithmetic number, because the mean of its divisors is an integer number (6549798915).

Almost surely, 2^128913857326 is an apocalyptic number.

128913857326 is a deficient number, since it is larger than the sum of its proper divisors (80679707954).

128913857326 is a wasteful number, since it uses less digits than its factorization.

128913857326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36468.

The product of its digits is 4354560, while the sum is 55.

The spelling of 128913857326 in words is "one hundred twenty-eight billion, nine hundred thirteen million, eight hundred fifty-seven thousand, three hundred twenty-six".