320618855 has 8 divisors (see below), whose sum is σ = 388148112. Its totient is φ = 254224768.

The previous prime is 320618849. The next prime is 320618869. The reversal of 320618855 is 558816023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320618855 - 2²⁸ = 52183399 is a prime.

It is a super-2 number, since 2×320618855² = 205592900363022050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283169 + ... + 284298.

It is an arithmetic number, because the mean of its divisors is an integer number (48518514).

Almost surely, 2^320618855 is an apocalyptic number.

320618855 is a deficient number, since it is larger than the sum of its proper divisors (67529257).

320618855 is a wasteful number, since it uses less digits than its factorization.

320618855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567585.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 320618855 is about 17905.8329881634. The cubic root of 320618855 is about 684.4310227208.

The spelling of 320618855 in words is "three hundred twenty million, six hundred eighteen thousand, eight hundred fifty-five".