320550104143505 has 4 divisors (see below), whose sum is σ = 384660124972212. Its totient is φ = 256440083314800.

The previous prime is 320550104143487. The next prime is 320550104143531. The reversal of 320550104143505 is 505341401055023.

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 154766736918784 + 165783367224721 = 12440528^2 + 12875689^2 .

It is not a de Polignac number, because 320550104143505 - 2⁸ = 320550104143249 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32055010414346 + ... + 32055010414355.

It is an arithmetic number, because the mean of its divisors is an integer number (96165031243053).

Almost surely, 2^{320550104143505} is an apocalyptic number.

It is an amenable number.

320550104143505 is a deficient number, since it is larger than the sum of its proper divisors (64110020828707).

320550104143505 is an equidigital number, since it uses as much as digits as its factorization.

320550104143505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64110020828706.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 320550104143505 its reverse (505341401055023), we get a palindrome (825891505198528).

The spelling of 320550104143505 in words is "three hundred twenty trillion, five hundred fifty billion, one hundred four million, one hundred forty-three thousand, five hundred five".