205132320045440 has 32 divisors (see below), whose sum is σ = 490394452610160. Its totient is φ = 82052928017920.

The previous prime is 205132320045391. The next prime is 205132320045461. The reversal of 205132320045440 is 44540023231502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 205132320045440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160259624396 + ... + 160259625675.

Almost surely, 2^{205132320045440} is an apocalyptic number.

205132320045440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205132320045440 is an abundant number, since it is smaller than the sum of its proper divisors (285262132564720).

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

205132320045440 is an equidigital number, since it uses as much as digits as its factorization.

205132320045440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320519250090 (or 320519250078 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 205132320045440 its reverse (44540023231502), we get a palindrome (249672343276942).

The spelling of 205132320045440 in words is "two hundred five trillion, one hundred thirty-two billion, three hundred twenty million, forty-five thousand, four hundred forty".