205418339349 has 8 divisors (see below), whose sum is σ = 273896602752. Its totient is φ = 136942817760.

The previous prime is 205418339267. The next prime is 205418339351. The reversal of 205418339349 is 943933814502.

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

It is not a de Polignac number, because 205418339349 - 2¹⁵ = 205418306581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205418379349) 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, 503757 + ... + 815234.

It is an arithmetic number, because the mean of its divisors is an integer number (34237075344).

Almost surely, 2^205418339349 is an apocalyptic number.

It is an amenable number.

205418339349 is a deficient number, since it is larger than the sum of its proper divisors (68478263403).

205418339349 is a wasteful number, since it uses less digits than its factorization.

205418339349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370907.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 205418339349 in words is "two hundred five billion, four hundred eighteen million, three hundred thirty-nine thousand, three hundred forty-nine".