320218413553 has 2 divisors, whose sum is σ = 320218413554. Its totient is φ = 320218413552.

The previous prime is 320218413551. The next prime is 320218413617. The reversal of 320218413553 is 355314812023.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194854264929 + 125364148624 = 441423^2 + 354068^2 .

It is an emirp because it is prime and its reverse (355314812023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320218413553 - 2¹ = 320218413551 is a prime.

Together with 320218413551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (320218413551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160109206776 + 160109206777.

It is an arithmetic number, because the mean of its divisors is an integer number (160109206777).

Almost surely, 2^320218413553 is an apocalyptic number.

It is an amenable number.

320218413553 is a deficient number, since it is larger than the sum of its proper divisors (1).

320218413553 is an equidigital number, since it uses as much as digits as its factorization.

320218413553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 320218413553 in words is "three hundred twenty billion, two hundred eighteen million, four hundred thirteen thousand, five hundred fifty-three".