318646322503 has 2 divisors, whose sum is σ = 318646322504. Its totient is φ = 318646322502.

The previous prime is 318646322479. The next prime is 318646322549. The reversal of 318646322503 is 305223646813.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 318646322503 - 2²¹ = 318644225351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 318646322503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318646322573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159323161251 + 159323161252.

It is an arithmetic number, because the mean of its divisors is an integer number (159323161252).

Almost surely, 2^318646322503 is an apocalyptic number.

318646322503 is a deficient number, since it is larger than the sum of its proper divisors (1).

318646322503 is an equidigital number, since it uses as much as digits as its factorization.

318646322503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 318646322503 in words is "three hundred eighteen billion, six hundred forty-six million, three hundred twenty-two thousand, five hundred three".