320644040545 has 8 divisors (see below), whose sum is σ = 391294422720. Its totient is φ = 252167516400.

The previous prime is 320644040467. The next prime is 320644040597. The reversal of 320644040545 is 545040446023.

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

It is not a de Polignac number, because 320644040545 - 2⁷ = 320644040417 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543464181 + ... + 543464770.

It is an arithmetic number, because the mean of its divisors is an integer number (48911802840).

Almost surely, 2^320644040545 is an apocalyptic number.

It is an amenable number.

320644040545 is a deficient number, since it is larger than the sum of its proper divisors (70650382175).

320644040545 is a wasteful number, since it uses less digits than its factorization.

320644040545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086929015.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 320644040545 its reverse (545040446023), we get a palindrome (865684486568).

The spelling of 320644040545 in words is "three hundred twenty billion, six hundred forty-four million, forty thousand, five hundred forty-five".