206510811064 has 32 divisors (see below), whose sum is σ = 418603006800. Its totient is φ = 95177099520.

The previous prime is 206510811049. The next prime is 206510811097. The reversal of 206510811064 is 460118015602.

206510811064 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206510811064² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18354157 + ... + 18365404.

Almost surely, 2^206510811064 is an apocalyptic number.

It is an amenable number.

206510811064 is an abundant number, since it is smaller than the sum of its proper divisors (212092195736).

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

206510811064 is a wasteful number, since it uses less digits than its factorization.

206510811064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36719623 (or 36719619 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 206510811064 its reverse (460118015602), we get a palindrome (666628826666).

The spelling of 206510811064 in words is "two hundred six billion, five hundred ten million, eight hundred eleven thousand, sixty-four".