206563664560 has 80 divisors (see below), whose sum is σ = 536699211552. Its totient is φ = 73281996800.

The previous prime is 206563664551. The next prime is 206563664569. The reversal of 206563664560 is 65466365602.

It is an interprime number because it is at equal distance from previous prime (206563664551) and next prime (206563664569).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (206563664569) 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, 2826499 + ... + 2898658.

Almost surely, 2^206563664560 is an apocalyptic number.

206563664560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206563664560 is an abundant number, since it is smaller than the sum of its proper divisors (330135546992).

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

206563664560 is a wasteful number, since it uses less digits than its factorization.

206563664560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725222 (or 5725216 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 206563664560 in words is "two hundred six billion, five hundred sixty-three million, six hundred sixty-four thousand, five hundred sixty".