206543894259808 has 96 divisors (see below), whose sum is σ = 489526690544640. Its totient is φ = 83800992752640.

The previous prime is 206543894259803. The next prime is 206543894259811. The reversal of 206543894259808 is 808952498345602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206543894259803) 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, 10995733 + ... + 23108308.

It is an arithmetic number, because the mean of its divisors is an integer number (5099236359840).

Almost surely, 2^{206543894259808} is an apocalyptic number.

206543894259808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206543894259808 is an abundant number, since it is smaller than the sum of its proper divisors (282982796284832).

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

206543894259808 is a wasteful number, since it uses less digits than its factorization.

206543894259808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34105500 (or 34105492 counting only the distinct ones).

The product of its (nonzero) digits is 1194393600, while the sum is 73.

The spelling of 206543894259808 in words is "two hundred six trillion, five hundred forty-three billion, eight hundred ninety-four million, two hundred fifty-nine thousand, eight hundred eight".