320310645145 has 4 divisors (see below), whose sum is σ = 384372774180. Its totient is φ = 256248516112.

The previous prime is 320310645121. The next prime is 320310645181. The reversal of 320310645145 is 541546013023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37954442761 + 282356202384 = 194819^2 + 531372^2 .

It is a cyclic number.

It is not a de Polignac number, because 320310645145 - 2⁵ = 320310645113 is a prime.

It is a super-2 number, since 2×320310645145² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320310645145.

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 3 ways as a sum of consecutive naturals, for example, 32031064510 + ... + 32031064519.

It is an arithmetic number, because the mean of its divisors is an integer number (96093193545).

Almost surely, 2^320310645145 is an apocalyptic number.

It is an amenable number.

320310645145 is a deficient number, since it is larger than the sum of its proper divisors (64062129035).

320310645145 is an equidigital number, since it uses as much as digits as its factorization.

320310645145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64062129034.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 320310645145 its reverse (541546013023), we get a palindrome (861856658168).

The spelling of 320310645145 in words is "three hundred twenty billion, three hundred ten million, six hundred forty-five thousand, one hundred forty-five".