318856503450 has 24 divisors (see below), whose sum is σ = 790764128928. Its totient is φ = 85028400880.

The previous prime is 318856503439. The next prime is 318856503461. The reversal of 318856503450 is 54305658813.

It is an interprime number because it is at equal distance from previous prime (318856503439) and next prime (318856503461).

It is a self number, because there is not a number n which added to its sum of digits gives 318856503450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1062854862 + ... + 1062855161.

It is an arithmetic number, because the mean of its divisors is an integer number (32948505372).

Almost surely, 2^318856503450 is an apocalyptic number.

318856503450 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

318856503450 is an abundant number, since it is smaller than the sum of its proper divisors (471907625478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318856503450 is a wasteful number, since it uses less digits than its factorization.

318856503450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125710038 (or 2125710033 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 318856503450 in words is "three hundred eighteen billion, eight hundred fifty-six million, five hundred three thousand, four hundred fifty".