205322100064 has 96 divisors (see below), whose sum is σ = 451120713120. Its totient is φ = 91529797632.

The previous prime is 205322100043. The next prime is 205322100083. The reversal of 205322100064 is 460001223502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 713347 + ... + 958909.

It is an arithmetic number, because the mean of its divisors is an integer number (4699174095).

Almost surely, 2^205322100064 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 205322100064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225560356560).

205322100064 is an abundant number, since it is smaller than the sum of its proper divisors (245798613056).

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

205322100064 is a wasteful number, since it uses less digits than its factorization.

205322100064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245672 (or 245664 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 205322100064 its reverse (460001223502), we get a palindrome (665323323566).

The spelling of 205322100064 in words is "two hundred five billion, three hundred twenty-two million, one hundred thousand, sixty-four".