320122523503565 has 4 divisors (see below), whose sum is σ = 384147028204284. Its totient is φ = 256098018802848.

The previous prime is 320122523503537. The next prime is 320122523503589. The reversal of 320122523503565 is 565305325221023.

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 47858696328004 + 272263827175561 = 6917998^2 + 16500419^2 .

It is a cyclic number.

It is not a de Polignac number, because 320122523503565 - 2⁶ = 320122523503501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 32012252350352 + ... + 32012252350361.

It is an arithmetic number, because the mean of its divisors is an integer number (96036757051071).

Almost surely, 2^{320122523503565} is an apocalyptic number.

It is an amenable number.

320122523503565 is a deficient number, since it is larger than the sum of its proper divisors (64024504700719).

320122523503565 is an equidigital number, since it uses as much as digits as its factorization.

320122523503565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64024504700718.

The product of its (nonzero) digits is 1620000, while the sum is 44.

Adding to 320122523503565 its reverse (565305325221023), we get a palindrome (885427848724588).

The spelling of 320122523503565 in words is "three hundred twenty trillion, one hundred twenty-two billion, five hundred twenty-three million, five hundred three thousand, five hundred sixty-five".