205163934449 has 8 divisors (see below), whose sum is σ = 214198085760. Its totient is φ = 196139281536.

The previous prime is 205163934401. The next prime is 205163934457. The reversal of 205163934449 is 944439361502.

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 205163934449 - 2⁸ = 205163934193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205163934397 and 205163934406.

It is not an unprimeable number, because it can be changed into a prime (205163934949) 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, 2330432 + ... + 2416865.

It is an arithmetic number, because the mean of its divisors is an integer number (26774760720).

Almost surely, 2^205163934449 is an apocalyptic number.

It is an amenable number.

205163934449 is a deficient number, since it is larger than the sum of its proper divisors (9034151311).

205163934449 is a wasteful number, since it uses less digits than its factorization.

205163934449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749199.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 205163934449 in words is "two hundred five billion, one hundred sixty-three million, nine hundred thirty-four thousand, four hundred forty-nine".