205245335141240 has 64 divisors (see below), whose sum is σ = 465893924139360. Its totient is φ = 81370697748480.

The previous prime is 205245335141123. The next prime is 205245335141267. The reversal of 205245335141240 is 42141533542502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529735667 + ... + 530122973.

Almost surely, 2^{205245335141240} is an apocalyptic number.

205245335141240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205245335141240 is an abundant number, since it is smaller than the sum of its proper divisors (260648588998120).

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

205245335141240 is a wasteful number, since it uses less digits than its factorization.

205245335141240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504672 (or 504668 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

Adding to 205245335141240 its reverse (42141533542502), we get a palindrome (247386868683742).

The spelling of 205245335141240 in words is "two hundred five trillion, two hundred forty-five billion, three hundred thirty-five million, one hundred forty-one thousand, two hundred forty".