128379878322 has 8 divisors (see below), whose sum is σ = 256759756656. Its totient is φ = 42793292772.

The previous prime is 128379878321. The next prime is 128379878323. The reversal of 128379878322 is 223878973821.

It is an interprime number because it is at equal distance from previous prime (128379878321) and next prime (128379878323).

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

128379878322 is an admirable number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (128379878321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10698323188 + ... + 10698323199.

It is an arithmetic number, because the mean of its divisors is an integer number (32094969582).

Almost surely, 2^128379878322 is an apocalyptic number.

128379878322 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.

128379878322 is a wasteful number, since it uses less digits than its factorization.

128379878322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21396646392.

The product of its digits is 16257024, while the sum is 60.

The spelling of 128379878322 in words is "one hundred twenty-eight billion, three hundred seventy-nine million, eight hundred seventy-eight thousand, three hundred twenty-two".