128420500033 has 8 divisors (see below), whose sum is σ = 146918068352. Its totient is φ = 109960877376.

The previous prime is 128420500009. The next prime is 128420500111. The reversal of 128420500033 is 330005024821.

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

It is not a de Polignac number, because 128420500033 - 2²⁵ = 128386945601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128420499974 and 128420500010.

It is not an unprimeable number, because it can be changed into a prime (128420500633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9479160 + ... + 9492697.

It is an arithmetic number, because the mean of its divisors is an integer number (18364758544).

Almost surely, 2^128420500033 is an apocalyptic number.

It is an amenable number.

128420500033 is a deficient number, since it is larger than the sum of its proper divisors (18497568319).

128420500033 is an equidigital number, since it uses as much as digits as its factorization.

128420500033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18972831.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 128420500033 its reverse (330005024821), we get a palindrome (458425524854).

The spelling of 128420500033 in words is "one hundred twenty-eight billion, four hundred twenty million, five hundred thousand, thirty-three".