128553733 has 16 divisors (see below), whose sum is σ = 161441280. Its totient is φ = 99442800.

The previous prime is 128553721. The next prime is 128553749. The reversal of 128553733 is 337355821.

It is a cyclic number.

It is not a de Polignac number, because 128553733 - 2²¹ = 126456581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128553692 and 128553701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128553793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4698 + ... + 16708.

It is an arithmetic number, because the mean of its divisors is an integer number (10090080).

Almost surely, 2^128553733 is an apocalyptic number.

It is an amenable number.

128553733 is a deficient number, since it is larger than the sum of its proper divisors (32887547).

128553733 is a wasteful number, since it uses less digits than its factorization.

128553733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12168.

The product of its digits is 75600, while the sum is 37.

The square root of 128553733 is about 11338.1538620712. The cubic root of 128553733 is about 504.6941035403.

It can be divided in two parts, 128553 and 733, that added together give a triangular number (129286 = T₅₀₈).

The spelling of 128553733 in words is "one hundred twenty-eight million, five hundred fifty-three thousand, seven hundred thirty-three".