204939144309 has 8 divisors (see below), whose sum is σ = 282066779392. Its totient is φ = 132218802720.

The previous prime is 204939144301. The next prime is 204939144323. The reversal of 204939144309 is 903441939402.

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

It is not a de Polignac number, because 204939144309 - 2³ = 204939144301 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 (204939144301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1101823264 + ... + 1101823449.

It is an arithmetic number, because the mean of its divisors is an integer number (35258347424).

Almost surely, 2^204939144309 is an apocalyptic number.

It is an amenable number.

204939144309 is a deficient number, since it is larger than the sum of its proper divisors (77127635083).

204939144309 is a wasteful number, since it uses less digits than its factorization.

204939144309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203646747.

The product of its (nonzero) digits is 839808, while the sum is 48.

The spelling of 204939144309 in words is "two hundred four billion, nine hundred thirty-nine million, one hundred forty-four thousand, three hundred nine".