128278844967 has 64 divisors (see below), whose sum is σ = 217412894720. Its totient is φ = 65446704000.

The previous prime is 128278844959. The next prime is 128278844971. The reversal of 128278844967 is 769448872821.

It is not a de Polignac number, because 128278844967 - 2³ = 128278844959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128278844898 and 128278844907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128278844867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27578592 + ... + 27583242.

It is an arithmetic number, because the mean of its divisors is an integer number (3397076480).

Almost surely, 2^128278844967 is an apocalyptic number.

128278844967 is a deficient number, since it is larger than the sum of its proper divisors (89134049753).

128278844967 is a wasteful number, since it uses less digits than its factorization.

128278844967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7964.

The product of its digits is 86704128, while the sum is 66.

The spelling of 128278844967 in words is "one hundred twenty-eight billion, two hundred seventy-eight million, eight hundred forty-four thousand, nine hundred sixty-seven".