128633425449966 has 12 divisors (see below), whose sum is σ = 278705755141632. Its totient is φ = 42877808483316.

The previous prime is 128633425449961. The next prime is 128633425449967. The reversal of 128633425449966 is 669944524336821.

128633425449966 is a `hidden beast` number, since 1 + 2 + 8 + 6 + 33 + 42 + 5 + 4 + 499 + 66 = 666.

128633425449966 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 128633425449894 and 128633425449903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128633425449961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3573150706926 + ... + 3573150706961.

It is an arithmetic number, because the mean of its divisors is an integer number (23225479595136).

Almost surely, 2^{128633425449966} is an apocalyptic number.

128633425449966 is an abundant number, since it is smaller than the sum of its proper divisors (150072329691666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128633425449966 is a wasteful number, since it uses less digits than its factorization.

128633425449966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7146301413895 (or 7146301413892 counting only the distinct ones).

The product of its digits is 1612431360, while the sum is 72.

The spelling of 128633425449966 in words is "one hundred twenty-eight trillion, six hundred thirty-three billion, four hundred twenty-five million, four hundred forty-nine thousand, nine hundred sixty-six".