318303645403 has 2 divisors, whose sum is σ = 318303645404. Its totient is φ = 318303645402.

The previous prime is 318303645391. The next prime is 318303645421. The reversal of 318303645403 is 304546303813.

It is a weak prime.

It is an emirp because it is prime and its reverse (304546303813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318303645403 is a prime.

It is not a weakly prime, because it can be changed into another prime (318303645203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159151822701 + 159151822702.

It is an arithmetic number, because the mean of its divisors is an integer number (159151822702).

Almost surely, 2^318303645403 is an apocalyptic number.

318303645403 is a deficient number, since it is larger than the sum of its proper divisors (1).

318303645403 is an equidigital number, since it uses as much as digits as its factorization.

318303645403 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 40.

The spelling of 318303645403 in words is "three hundred eighteen billion, three hundred three million, six hundred forty-five thousand, four hundred three".