205425065340 has 144 divisors (see below), whose sum is σ = 709325600256. Its totient is φ = 47634787200.

The previous prime is 205425065333. The next prime is 205425065381. The reversal of 205425065340 is 43560524502.

205425065340 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 250 + 65 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 205425065295 and 205425065304.

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 47 ways as a sum of consecutive naturals, for example, 2209896 + ... + 2300975.

It is an arithmetic number, because the mean of its divisors is an integer number (4925872224).

Almost surely, 2^205425065340 is an apocalyptic number.

205425065340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205425065340 is an abundant number, since it is smaller than the sum of its proper divisors (503900534916).

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

205425065340 is a wasteful number, since it uses less digits than its factorization.

205425065340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510920 (or 4510915 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 205425065340 its reverse (43560524502), we get a palindrome (248985589842).

The spelling of 205425065340 in words is "two hundred five billion, four hundred twenty-five million, sixty-five thousand, three hundred forty".