205310403064 has 48 divisors (see below), whose sum is σ = 417124819800. Its totient is φ = 94695479424.

The previous prime is 205310403041. The next prime is 205310403083. The reversal of 205310403064 is 460304013502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2009242 + ... + 2108950.

Almost surely, 2^205310403064 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 205310403064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208562409900).

205310403064 is an abundant number, since it is smaller than the sum of its proper divisors (211814416736).

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

205310403064 is a wasteful number, since it uses less digits than its factorization.

205310403064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101264 (or 101247 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 205310403064 its reverse (460304013502), we get a palindrome (665614416566).

The spelling of 205310403064 in words is "two hundred five billion, three hundred ten million, four hundred three thousand, sixty-four".