318172217472 has 72 divisors (see below), whose sum is σ = 915628794015. Its totient is φ = 106051024128.

The previous prime is 318172217459. The next prime is 318172217509. The reversal of 318172217472 is 274712271813.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

318172217472 is a `hidden beast` number, since 3 + 1 + 8 + 172 + 2 + 1 + 7 + 472 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159086108736 + 159086108736 = 398856^2 + 398856^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=398856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19136779 + ... + 19153397.

Almost surely, 2^318172217472 is an apocalyptic number.

318172217472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

318172217472 is an abundant number, since it is smaller than the sum of its proper divisors (597456576543).

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

318172217472 is an frugal number, since it uses more digits than its factorization.

318172217472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33258 (or 16624 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The spelling of 318172217472 in words is "three hundred eighteen billion, one hundred seventy-two million, two hundred seventeen thousand, four hundred seventy-two".