128382781858805 has 16 divisors (see below), whose sum is σ = 154090936280064. Its totient is φ = 102685162233600.

The previous prime is 128382781858697. The next prime is 128382781858819. The reversal of 128382781858805 is 508858187283821.

It is not a de Polignac number, because 128382781858805 - 2¹² = 128382781854709 is a prime.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528500804 + ... + 528743666.

It is an arithmetic number, because the mean of its divisors is an integer number (9630683517504).

Almost surely, 2^{128382781858805} is an apocalyptic number.

It is an amenable number.

128382781858805 is a deficient number, since it is larger than the sum of its proper divisors (25708154421259).

128382781858805 is a wasteful number, since it uses less digits than its factorization.

128382781858805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264116.

The product of its (nonzero) digits is 550502400, while the sum is 74.

The spelling of 128382781858805 in words is "one hundred twenty-eight trillion, three hundred eighty-two billion, seven hundred eighty-one million, eight hundred fifty-eight thousand, eight hundred five".