320216504449 has 2 divisors, whose sum is σ = 320216504450. Its totient is φ = 320216504448.

The previous prime is 320216504347. The next prime is 320216504453. The reversal of 320216504449 is 944405612023.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276187036225 + 44029468224 = 525535^2 + 209832^2 .

It is a cyclic number.

It is not a de Polignac number, because 320216504449 - 2¹¹ = 320216502401 is a prime.

It is not a weakly prime, because it can be changed into another prime (320216204449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160108252224 + 160108252225.

It is an arithmetic number, because the mean of its divisors is an integer number (160108252225).

Almost surely, 2^320216504449 is an apocalyptic number.

It is an amenable number.

320216504449 is a deficient number, since it is larger than the sum of its proper divisors (1).

320216504449 is an equidigital number, since it uses as much as digits as its factorization.

320216504449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 320216504449 in words is "three hundred twenty billion, two hundred sixteen million, five hundred four thousand, four hundred forty-nine".