206881870680 has 48 divisors (see below), whose sum is σ = 672366080880. Its totient is φ = 55168498752.

The previous prime is 206881870673. The next prime is 206881870681. The reversal of 206881870680 is 86078188602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206881870681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287335572 + ... + 287336291.

It is an arithmetic number, because the mean of its divisors is an integer number (14007626685).

Almost surely, 2^206881870680 is an apocalyptic number.

206881870680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206881870680 is an abundant number, since it is smaller than the sum of its proper divisors (465484210200).

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

206881870680 is a wasteful number, since it uses less digits than its factorization.

206881870680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574671880 (or 574671873 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 206881870680 in words is "two hundred six billion, eight hundred eighty-one million, eight hundred seventy thousand, six hundred eighty".