206688624260 has 24 divisors (see below), whose sum is σ = 449013219480. Its totient is φ = 79824571904.

The previous prime is 206688624257. The next prime is 206688624313. The reversal of 206688624260 is 62426886602.

It can be written as a sum of positive squares in 4 ways, for example, as 27872970304 + 178815653956 = 166952^2 + 422866^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206688624199 and 206688624208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178179269 + ... + 178180428.

It is an arithmetic number, because the mean of its divisors is an integer number (18708884145).

Almost surely, 2^206688624260 is an apocalyptic number.

206688624260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206688624260 is an abundant number, since it is smaller than the sum of its proper divisors (242324595220).

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

206688624260 is a wasteful number, since it uses less digits than its factorization.

206688624260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356359735 (or 356359733 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 206688624260 in words is "two hundred six billion, six hundred eighty-eight million, six hundred twenty-four thousand, two hundred sixty".