204661641 has 24 divisors (see below), whose sum is σ = 282756960. Its totient is φ = 131657152.

The previous prime is 204661621. The next prime is 204661669. The reversal of 204661641 is 146166402.

It is not a de Polignac number, because 204661641 - 2⁶ = 204661577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204661599 and 204661608.

It is not an unprimeable number, because it can be changed into a prime (204661601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 589630 + ... + 589976.

It is an arithmetic number, because the mean of its divisors is an integer number (11781540).

Almost surely, 2^204661641 is an apocalyptic number.

It is an amenable number.

204661641 is a deficient number, since it is larger than the sum of its proper divisors (78095319).

204661641 is an equidigital number, since it uses as much as digits as its factorization.

204661641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 204661641 is about 14306.0001747519. Note that the first 3 decimals coincide. The cubic root of 204661641 is about 589.3122705786.

The spelling of 204661641 in words is "two hundred four million, six hundred sixty-one thousand, six hundred forty-one".