205354042663 has 8 divisors (see below), whose sum is σ = 256025819520. Its totient is φ = 160016137080.

The previous prime is 205354042661. The next prime is 205354042703. The reversal of 205354042663 is 366240453502.

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 205354042663 - 2¹ = 205354042661 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 (205354042661) 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, 1333467733 + ... + 1333467886.

It is an arithmetic number, because the mean of its divisors is an integer number (32003227440).

Almost surely, 2^205354042663 is an apocalyptic number.

205354042663 is a deficient number, since it is larger than the sum of its proper divisors (50671776857).

205354042663 is a wasteful number, since it uses less digits than its factorization.

205354042663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666935637.

The product of its (nonzero) digits is 518400, while the sum is 40.

The spelling of 205354042663 in words is "two hundred five billion, three hundred fifty-four million, forty-two thousand, six hundred sixty-three".