205313636054040 has 64 divisors (see below), whose sum is σ = 616014037267200. Its totient is φ = 54743802582912.

The previous prime is 205313636054027. The next prime is 205313636054077. The reversal of 205313636054040 is 40450636313502.

It is a junction number, because it is equal to n+sod(n) for n = 205313636053983 and 205313636054001.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 100553230 + ... + 102574749.

It is an arithmetic number, because the mean of its divisors is an integer number (9625219332300).

Almost surely, 2^{205313636054040} is an apocalyptic number.

205313636054040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205313636054040 is an abundant number, since it is smaller than the sum of its proper divisors (410700401213160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205313636054040 is a wasteful number, since it uses less digits than its factorization.

205313636054040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203136416 (or 203136412 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 205313636054040 in words is "two hundred five trillion, three hundred thirteen billion, six hundred thirty-six million, fifty-four thousand, forty".