204635641 has 8 divisors (see below), whose sum is σ = 240190400. Its totient is φ = 170661168.

The previous prime is 204635617. The next prime is 204635657. The reversal of 204635641 is 146536402.

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

It is not a de Polignac number, because 204635641 - 2¹¹ = 204633593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204635611) 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 7 ways as a sum of consecutive naturals, for example, 394791 + ... + 395308.

It is an arithmetic number, because the mean of its divisors is an integer number (30023800).

Almost surely, 2^204635641 is an apocalyptic number.

It is an amenable number.

204635641 is a deficient number, since it is larger than the sum of its proper divisors (35554759).

204635641 is an equidigital number, since it uses as much as digits as its factorization.

204635641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790143.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 204635641 is about 14305.0914362684. The cubic root of 204635641 is about 589.2873143178.

The spelling of 204635641 in words is "two hundred four million, six hundred thirty-five thousand, six hundred forty-one".