128436276869394 has 32 divisors (see below), whose sum is σ = 282517767786240. Its totient is φ = 38678027730432.

The previous prime is 128436276869377. The next prime is 128436276869399. The reversal of 128436276869394 is 493968672634821.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is not an unprimeable number, because it can be changed into a prime (128436276869399) 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, 17517219039 + ... + 17517226370.

It is an arithmetic number, because the mean of its divisors is an integer number (8828680243320).

Almost surely, 2^{128436276869394} is an apocalyptic number.

128436276869394 is an abundant number, since it is smaller than the sum of its proper divisors (154081490916846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128436276869394 is a wasteful number, since it uses less digits than its factorization.

128436276869394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35034445474.

The product of its digits is 4514807808, while the sum is 78.

The spelling of 128436276869394 in words is "one hundred twenty-eight trillion, four hundred thirty-six billion, two hundred seventy-six million, eight hundred sixty-nine thousand, three hundred ninety-four".