320216683545 has 48 divisors (see below), whose sum is σ = 626379998400. Its totient is φ = 149902892160.

The previous prime is 320216683519. The next prime is 320216683573. The reversal of 320216683545 is 545386612023.

320216683545 is a `hidden beast` number, since 3 + 2 + 0 + 21 + 6 + 6 + 83 + 545 = 666.

It is not a de Polignac number, because 320216683545 - 2⁶ = 320216683481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 320216683545.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11139135 + ... + 11167844.

It is an arithmetic number, because the mean of its divisors is an integer number (13049583300).

Almost surely, 2^320216683545 is an apocalyptic number.

It is an amenable number.

320216683545 is a deficient number, since it is larger than the sum of its proper divisors (306163314855).

320216683545 is a wasteful number, since it uses less digits than its factorization.

320216683545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22307030 (or 22307027 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 320216683545 in words is "three hundred twenty billion, two hundred sixteen million, six hundred eighty-three thousand, five hundred forty-five".