108443723521 has 4 divisors (see below), whose sum is σ = 123935684032. Its totient is φ = 92951763012.

The previous prime is 108443723491. The next prime is 108443723527. The reversal of 108443723521 is 125327344801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 108443723521 - 2¹³ = 108443715329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108443723527) 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 3 ways as a sum of consecutive naturals, for example, 7745980245 + ... + 7745980258.

It is an arithmetic number, because the mean of its divisors is an integer number (30983921008).

Almost surely, 2^108443723521 is an apocalyptic number.

It is an amenable number.

108443723521 is a deficient number, since it is larger than the sum of its proper divisors (15491960511).

108443723521 is an equidigital number, since it uses as much as digits as its factorization.

108443723521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15491960510.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 108443723521 in words is "one hundred eight billion, four hundred forty-three million, seven hundred twenty-three thousand, five hundred twenty-one".