128197996533 has 12 divisors (see below), whose sum is σ = 191148267648. Its totient is φ = 82708384680.

The previous prime is 128197996513. The next prime is 128197996543. The reversal of 128197996533 is 335699791821.

128197996533 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 9 + 7 + 9 + 96 + 533 = 666.

It is not a de Polignac number, because 128197996533 - 2¹⁶ = 128197930997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128197996513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229745235 + ... + 229745792.

It is an arithmetic number, because the mean of its divisors is an integer number (15929022304).

Almost surely, 2^128197996533 is an apocalyptic number.

It is an amenable number.

128197996533 is a deficient number, since it is larger than the sum of its proper divisors (62950271115).

128197996533 is a wasteful number, since it uses less digits than its factorization.

128197996533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459491064 (or 459491061 counting only the distinct ones).

The product of its digits is 22044960, while the sum is 63.

The spelling of 128197996533 in words is "one hundred twenty-eight billion, one hundred ninety-seven million, nine hundred ninety-six thousand, five hundred thirty-three".