320500406645 has 16 divisors (see below), whose sum is σ = 417902062080. Its totient is φ = 235069905600.

The previous prime is 320500406609. The next prime is 320500406651. The reversal of 320500406645 is 546604005023.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-320500406645 is a prime.

It is a super-2 number, since 2×320500406645² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54411386 + ... + 54417275.

It is an arithmetic number, because the mean of its divisors is an integer number (26118878880).

Almost surely, 2^320500406645 is an apocalyptic number.

It is an amenable number.

320500406645 is a deficient number, since it is larger than the sum of its proper divisors (97401655435).

320500406645 is a wasteful number, since it uses less digits than its factorization.

320500406645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108828716.

The product of its (nonzero) digits is 86400, while the sum is 35.

The spelling of 320500406645 in words is "three hundred twenty billion, five hundred million, four hundred six thousand, six hundred forty-five".