318320380529 has 2 divisors, whose sum is σ = 318320380530. Its totient is φ = 318320380528.

The previous prime is 318320380523. The next prime is 318320380531. The reversal of 318320380529 is 925083023813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170360911504 + 147959469025 = 412748^2 + 384655^2 .

It is a cyclic number.

It is not a de Polignac number, because 318320380529 - 2⁴ = 318320380513 is a prime.

Together with 318320380531, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318320380529.

It is not a weakly prime, because it can be changed into another prime (318320380523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159160190264 + 159160190265.

It is an arithmetic number, because the mean of its divisors is an integer number (159160190265).

Almost surely, 2^318320380529 is an apocalyptic number.

It is an amenable number.

318320380529 is a deficient number, since it is larger than the sum of its proper divisors (1).

318320380529 is an equidigital number, since it uses as much as digits as its factorization.

318320380529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 318320380529 in words is "three hundred eighteen billion, three hundred twenty million, three hundred eighty thousand, five hundred twenty-nine".