318220081992 has 108 divisors (see below), whose sum is σ = 909853791795. Its totient is φ = 100461832416.

The previous prime is 318220081987. The next prime is 318220082003. The reversal of 318220081992 is 299180022813.

It is a happy number.

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.

It can be written as a sum of positive squares in only one way, i.e., 159110040996 + 159110040996 = 398886^2 + 398886^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=398886.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 90944259 + ... + 90947757.

Almost surely, 2^318220081992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318220081992

318220081992 is an abundant number, since it is smaller than the sum of its proper divisors (591633709803).

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

318220081992 is an equidigital number, since it uses as much as digits as its factorization.

318220081992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7048 (or 3523 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 318220081992 in words is "three hundred eighteen billion, two hundred twenty million, eighty-one thousand, nine hundred ninety-two".