204423466545 has 48 divisors (see below), whose sum is σ = 356166787392. Its totient is φ = 108462372480.

The previous prime is 204423466451. The next prime is 204423466553. The reversal of 204423466545 is 545664324402.

It is a happy number.

204423466545 is a `hidden beast` number, since 2 + 0 + 4 + 42 + 3 + 4 + 66 + 545 = 666.

204423466545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204423466545 - 2¹² = 204423462449 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204423466545.

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 47 ways as a sum of consecutive naturals, for example, 44025994 + ... + 44030636.

It is an arithmetic number, because the mean of its divisors is an integer number (7420141404).

Almost surely, 2^204423466545 is an apocalyptic number.

It is an amenable number.

204423466545 is a deficient number, since it is larger than the sum of its proper divisors (151743320847).

204423466545 is a wasteful number, since it uses less digits than its factorization.

204423466545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9502 (or 9499 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 45.

The spelling of 204423466545 in words is "two hundred four billion, four hundred twenty-three million, four hundred sixty-six thousand, five hundred forty-five".