109163712849185 has 4 divisors (see below), whose sum is σ = 130996455419028. Its totient is φ = 87330970279344.

The previous prime is 109163712849137. The next prime is 109163712849203. The reversal of 109163712849185 is 581948217361901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64038261716881 + 45125451132304 = 8002391^2 + 6717548^2 .

It is a cyclic number.

It is not a de Polignac number, because 109163712849185 - 2³⁸ = 108888834942241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10916371284914 + ... + 10916371284923.

It is an arithmetic number, because the mean of its divisors is an integer number (32749113854757).

It is a 2-persistent number, because it is pandigital, and so is 2⋅109163712849185 = 218327425698370, but 3⋅109163712849185 = 327491138547555 is not.

Almost surely, 2^{109163712849185} is an apocalyptic number.

It is an amenable number.

109163712849185 is a deficient number, since it is larger than the sum of its proper divisors (21832742569843).

109163712849185 is an equidigital number, since it uses as much as digits as its factorization.

109163712849185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21832742569842.

The product of its (nonzero) digits is 26127360, while the sum is 65.

The spelling of 109163712849185 in words is "one hundred nine trillion, one hundred sixty-three billion, seven hundred twelve million, eight hundred forty-nine thousand, one hundred eighty-five".