318720645382 has 4 divisors (see below), whose sum is σ = 478080968076. Its totient is φ = 159360322690.

The previous prime is 318720645379. The next prime is 318720645413. The reversal of 318720645382 is 283546027813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 283546027813 = 1249 ⋅227018437.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 79680161344 + ... + 79680161347.

It is an arithmetic number, because the mean of its divisors is an integer number (119520242019).

Almost surely, 2^318720645382 is an apocalyptic number.

318720645382 is a deficient number, since it is larger than the sum of its proper divisors (159360322694).

318720645382 is a wasteful number, since it uses less digits than its factorization.

318720645382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159360322693.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 318720645382 in words is "three hundred eighteen billion, seven hundred twenty million, six hundred forty-five thousand, three hundred eighty-two".