128144511 has 20 divisors (see below), whose sum is σ = 208829544. Its totient is φ = 77662800.

The previous prime is 128144503. The next prime is 128144537. The reversal of 128144511 is 115441821.

It is a happy number.

128144511 is a `hidden beast` number, since 1 + 2 + 8 + 144 + 511 = 666.

It is not a de Polignac number, because 128144511 - 2³ = 128144503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128144501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71020 + ... + 72801.

Almost surely, 2^128144511 is an apocalyptic number.

128144511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128144511 is a deficient number, since it is larger than the sum of its proper divisors (80685033).

128144511 is a wasteful number, since it uses less digits than its factorization.

128144511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143844 (or 143835 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 128144511 is about 11320.0932416655. The cubic root of 128144511 is about 504.1580074312.

The spelling of 128144511 in words is "one hundred twenty-eight million, one hundred forty-four thousand, five hundred eleven".