205051440144340 has 12 divisors (see below), whose sum is σ = 430608024303156. Its totient is φ = 82020576057728.

The previous prime is 205051440144329. The next prime is 205051440144413. The reversal of 205051440144340 is 43441044150502.

It can be written as a sum of positive squares in 2 ways, for example, as 118614665153296 + 86436774991044 = 10891036^2 + 9297138^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 205051440144340.

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 3 ways as a sum of consecutive naturals, for example, 5126286003589 + ... + 5126286003628.

It is an arithmetic number, because the mean of its divisors is an integer number (35884002025263).

Almost surely, 2^{205051440144340} is an apocalyptic number.

205051440144340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205051440144340 is an abundant number, since it is smaller than the sum of its proper divisors (225556584158816).

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

205051440144340 is a wasteful number, since it uses less digits than its factorization.

205051440144340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10252572007226 (or 10252572007224 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 205051440144340 its reverse (43441044150502), we get a palindrome (248492484294842).

The spelling of 205051440144340 in words is "two hundred five trillion, fifty-one billion, four hundred forty million, one hundred forty-four thousand, three hundred forty".