204455203549 has 8 divisors (see below), whose sum is σ = 207266764280. Its totient is φ = 201643934976.

The previous prime is 204455203541. The next prime is 204455203559. The reversal of 204455203549 is 945302554402.

It can be written as a sum of positive squares in 4 ways, for example, as 4428902500 + 200026301049 = 66550^2 + 447243^2 .

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 204455203549 - 2³ = 204455203541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204455203541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1596697 + ... + 1719985.

It is an arithmetic number, because the mean of its divisors is an integer number (25908345535).

Almost surely, 2^204455203549 is an apocalyptic number.

It is an amenable number.

204455203549 is a deficient number, since it is larger than the sum of its proper divisors (2811560731).

204455203549 is a wasteful number, since it uses less digits than its factorization.

204455203549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146079.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 204455203549 in words is "two hundred four billion, four hundred fifty-five million, two hundred three thousand, five hundred forty-nine".