320445650385 has 48 divisors (see below), whose sum is σ = 634922361216. Its totient is φ = 146458335744.

The previous prime is 320445650383. The next prime is 320445650387. The reversal of 320445650385 is 583056544023.

320445650385 is a `hidden beast` number, since 3 + 2 + 0 + 4 + 4 + 565 + 0 + 3 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (320445650383) and next prime (320445650387).

It is not a de Polignac number, because 320445650385 - 2¹ = 320445650383 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 320445650385.

It is not an unprimeable number, because it can be changed into a prime (320445650381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1411762 + ... + 1622948.

It is an arithmetic number, because the mean of its divisors is an integer number (13227549192).

Almost surely, 2^320445650385 is an apocalyptic number.

320445650385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320445650385 is a deficient number, since it is larger than the sum of its proper divisors (314476710831).

320445650385 is a wasteful number, since it uses less digits than its factorization.

320445650385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216022 (or 216019 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 45.

The spelling of 320445650385 in words is "three hundred twenty billion, four hundred forty-five million, six hundred fifty thousand, three hundred eighty-five".