43128171805 has 16 divisors (see below), whose sum is σ = 53195063040. Its totient is φ = 33543191232.

The previous prime is 43128171803. The next prime is 43128171829. The reversal of 43128171805 is 50817182134.

It is not a de Polignac number, because 43128171805 - 2¹ = 43128171803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43128171803) 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 15 ways as a sum of consecutive naturals, for example, 140332 + ... + 325498.

It is an arithmetic number, because the mean of its divisors is an integer number (3324691440).

Almost surely, 2^43128171805 is an apocalyptic number.

It is an amenable number.

43128171805 is a deficient number, since it is larger than the sum of its proper divisors (10066891235).

43128171805 is a wasteful number, since it uses less digits than its factorization.

43128171805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186468.

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 43128171805 in words is "forty-three billion, one hundred twenty-eight million, one hundred seventy-one thousand, eight hundred five".