128382781858806 has 8 divisors (see below), whose sum is σ = 256765563717624. Its totient is φ = 42794260619600.

The previous prime is 128382781858697. The next prime is 128382781858819. The reversal of 128382781858806 is 608858187283821.

It is a sphenic number, since it is the product of 3 distinct primes.

128382781858806 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10698565154895 + ... + 10698565154906.

It is an arithmetic number, because the mean of its divisors is an integer number (32095695464703).

Almost surely, 2^{128382781858806} is an apocalyptic number.

128382781858806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128382781858806 is a wasteful number, since it uses less digits than its factorization.

128382781858806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21397130309806.

The product of its (nonzero) digits is 660602880, while the sum is 75.

The spelling of 128382781858806 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 six".