205560730650 has 96 divisors (see below), whose sum is σ = 557200908288. Its totient is φ = 49737412800.

The previous prime is 205560730643. The next prime is 205560730681. The reversal of 205560730650 is 56037065502.

It is a junction number, because it is equal to n+sod(n) for n = 205560730599 and 205560730608.

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, 743847 + ... + 982053.

It is an arithmetic number, because the mean of its divisors is an integer number (5804176128).

Almost surely, 2^205560730650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205560730650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278600454144).

205560730650 is an abundant number, since it is smaller than the sum of its proper divisors (351640177638).

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

205560730650 is a wasteful number, since it uses less digits than its factorization.

205560730650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238756 (or 238751 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 39.

The spelling of 205560730650 in words is "two hundred five billion, five hundred sixty million, seven hundred thirty thousand, six hundred fifty".