318945349920 has 48 divisors (see below), whose sum is σ = 1004677853760. Its totient is φ = 85052093184.

The previous prime is 318945349903. The next prime is 318945349937. The reversal of 318945349920 is 29943549813.

It is an interprime number because it is at equal distance from previous prime (318945349903) and next prime (318945349937).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×318945349920² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332234260 + ... + 332235219.

It is an arithmetic number, because the mean of its divisors is an integer number (20930788620).

Almost surely, 2^318945349920 is an apocalyptic number.

318945349920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

318945349920 is an abundant number, since it is smaller than the sum of its proper divisors (685732503840).

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

318945349920 is a wasteful number, since it uses less digits than its factorization.

318945349920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664469497 (or 664469489 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 318945349920 in words is "three hundred eighteen billion, nine hundred forty-five million, three hundred forty-nine thousand, nine hundred twenty".