204430440145 has 8 divisors (see below), whose sum is σ = 245487727656. Its totient is φ = 163430219136.

The previous prime is 204430440121. The next prime is 204430440191. The reversal of 204430440145 is 541044034402.

204430440145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30121685136 + 174308755009 = 173556^2 + 417503^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 204430440145 - 2¹⁷ = 204430309073 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 14258742 + ... + 14273071.

It is an arithmetic number, because the mean of its divisors is an integer number (30685965957).

Almost surely, 2^204430440145 is an apocalyptic number.

It is an amenable number.

204430440145 is a deficient number, since it is larger than the sum of its proper divisors (41057287511).

204430440145 is a wasteful number, since it uses less digits than its factorization.

204430440145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28533251.

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 204430440145 its reverse (541044034402), we get a palindrome (745474474547).

The spelling of 204430440145 in words is "two hundred four billion, four hundred thirty million, four hundred forty thousand, one hundred forty-five".