128023598842 has 16 divisors (see below), whose sum is σ = 200458756872. Its totient is φ = 61260736320.

The previous prime is 128023598819. The next prime is 128023598849. The reversal of 128023598842 is 248895320821.

It can be written as a sum of positive squares in 4 ways, for example, as 83468410281 + 44555188561 = 288909^2 + 211081^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128023598842.

It is not an unprimeable number, because it can be changed into a prime (128023598849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14176213 + ... + 14185240.

Almost surely, 2^128023598842 is an apocalyptic number.

128023598842 is a deficient number, since it is larger than the sum of its proper divisors (72435158030).

128023598842 is a wasteful number, since it uses less digits than its factorization.

128023598842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28361553.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 128023598842 in words is "one hundred twenty-eight billion, twenty-three million, five hundred ninety-eight thousand, eight hundred forty-two".