205561200120996 has 144 divisors (see below), whose sum is σ = 530157078671360. Its totient is φ = 61755306966720.

The previous prime is 205561200120923. The next prime is 205561200121001. The reversal of 205561200120996 is 699021002165502.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20426265 + ... + 28781151.

Almost surely, 2^{205561200120996} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205561200120996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265078539335680).

205561200120996 is an abundant number, since it is smaller than the sum of its proper divisors (324595878550364).

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

205561200120996 is a wasteful number, since it uses less digits than its factorization.

205561200120996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355062 (or 8355001 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 48.

The spelling of 205561200120996 in words is "two hundred five trillion, five hundred sixty-one billion, two hundred million, one hundred twenty thousand, nine hundred ninety-six".