206563664688 has 40 divisors (see below), whose sum is σ = 533877288000. Its totient is φ = 68821717824.

The previous prime is 206563664641. The next prime is 206563664689. The reversal of 206563664688 is 886466365602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (206563664689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 924358 + ... + 1125861.

It is an arithmetic number, because the mean of its divisors is an integer number (13346932200).

Almost surely, 2^206563664688 is an apocalyptic number.

It is an amenable number.

206563664688 is an abundant number, since it is smaller than the sum of its proper divisors (327313623312).

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

206563664688 is a wasteful number, since it uses less digits than its factorization.

206563664688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052329 (or 2052323 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 60.

The spelling of 206563664688 in words is "two hundred six billion, five hundred sixty-three million, six hundred sixty-four thousand, six hundred eighty-eight".