128346128278 has 16 divisors (see below), whose sum is σ = 194529989376.
Its totient is φ = 63506280960.
The previous prime is 128346128243. The next prime is 128346128321. The reversal of 128346128278 is 872821643821.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796701 + ... + 944152.
It is an arithmetic number, because the mean of its divisors is an integer number (12158124336).
Almost surely, 2128346128278 is an apocalyptic number.
128346128278 is a deficient number, since it is larger than the sum of its proper divisors (66183861098).
128346128278 is a wasteful number, since it uses less digits than its factorization.
128346128278 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1741239.
The product of its digits is 2064384, while the sum is 52.
The spelling of 128346128278 in words is "one hundred twenty-eight billion, three hundred forty-six million, one hundred twenty-eight thousand, two hundred seventy-eight".