128836487843 has 64 divisors (see below), whose sum is σ = 157751193600. Its totient is φ = 102930600960.

The previous prime is 128836487783. The next prime is 128836487849. The reversal of 128836487843 is 348784638821.

It is a Cunningham number, because it is equal to 358938²-1.

It is not a de Polignac number, because 128836487843 - 2⁶ = 128836487779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128836487849) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118089728 + ... + 118090818.

It is an arithmetic number, because the mean of its divisors is an integer number (2464862400).

Almost surely, 2^128836487843 is an apocalyptic number.

128836487843 is a deficient number, since it is larger than the sum of its proper divisors (28914705757).

128836487843 is a wasteful number, since it uses less digits than its factorization.

128836487843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380.

The product of its digits is 49545216, while the sum is 62.

The spelling of 128836487843 in words is "one hundred twenty-eight billion, eight hundred thirty-six million, four hundred eighty-seven thousand, eight hundred forty-three".