206210880680 has 48 divisors (see below), whose sum is σ = 539725422420. Its totient is φ = 70700872704.

The previous prime is 206210880661. The next prime is 206210880691. The reversal of 206210880680 is 86088012602.

It can be written as a sum of positive squares in 2 ways, for example, as 194246458756 + 11964421924 = 440734^2 + 109382^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52602857 + ... + 52606776.

Almost surely, 2^206210880680 is an apocalyptic number.

206210880680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206210880680 is an abundant number, since it is smaller than the sum of its proper divisors (333514541740).

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

206210880680 is a wasteful number, since it uses less digits than its factorization.

206210880680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105209658 (or 105209647 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The spelling of 206210880680 in words is "two hundred six billion, two hundred ten million, eight hundred eighty thousand, six hundred eighty".