320185664 has 14 divisors (see below), whose sum is σ = 635368554. Its totient is φ = 160092800.

The previous prime is 320185631. The next prime is 320185699. The reversal of 320185664 is 466581023.

It can be written as a sum of positive squares in only one way, i.e., 289272064 + 30913600 = 17008^2 + 5560^2 .

It is a super-2 number, since 2×320185664² = 205037718862241792, which contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2501387 + ... + 2501514.

Almost surely, 2^320185664 is an apocalyptic number.

It is an amenable number.

320185664 is a deficient number, since it is larger than the sum of its proper divisors (315182890).

320185664 is an equidigital number, since it uses as much as digits as its factorization.

320185664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002913 (or 5002903 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 320185664 is about 17893.7325340467. The cubic root of 320185664 is about 684.1226368345.

The spelling of 320185664 in words is "three hundred twenty million, one hundred eighty-five thousand, six hundred sixty-four".