128330722273 has 4 divisors (see below), whose sum is σ = 138202316308. Its totient is φ = 118459128240.

The previous prime is 128330722271. The next prime is 128330722291. The reversal of 128330722273 is 372227033821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 372227033821 = 43 ⋅8656442647.

It can be written as a sum of positive squares in 2 ways, for example, as 64580532129 + 63750190144 = 254127^2 + 252488^2 .

It is a cyclic number.

It is not a de Polignac number, because 128330722273 - 2¹ = 128330722271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128330722271) 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, 4935796998 + ... + 4935797023.

It is an arithmetic number, because the mean of its divisors is an integer number (34550579077).

Almost surely, 2^128330722273 is an apocalyptic number.

128330722273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

128330722273 is a deficient number, since it is larger than the sum of its proper divisors (9871594035).

128330722273 is an equidigital number, since it uses as much as digits as its factorization.

128330722273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871594034.

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 128330722273 in words is "one hundred twenty-eight billion, three hundred thirty million, seven hundred twenty-two thousand, two hundred seventy-three".