205061955824 has 80 divisors (see below), whose sum is σ = 441288705120. Its totient is φ = 91530362880.

The previous prime is 205061955821. The next prime is 205061955829. The reversal of 205061955824 is 428559160502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205061955821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2907344 + ... + 2977040.

It is an arithmetic number, because the mean of its divisors is an integer number (5516108814).

Almost surely, 2^205061955824 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 205061955824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220644352560).

205061955824 is an abundant number, since it is smaller than the sum of its proper divisors (236226749296).

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

205061955824 is a wasteful number, since it uses less digits than its factorization.

205061955824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70018 (or 70012 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 205061955824 in words is "two hundred five billion, sixty-one million, nine hundred fifty-five thousand, eight hundred twenty-four".