206541808128 has 60 divisors (see below), whose sum is σ = 596093656158. Its totient is φ = 68847267840.

The previous prime is 206541808117. The next prime is 206541808129. The reversal of 206541808128 is 821808145602.

206541808128 is a `hidden beast` number, since 2 + 0 + 6 + 541 + 8 + 0 + 81 + 28 = 666.

It can be written as a sum of positive squares in only one way, i.e., 193698572544 + 12843235584 = 440112^2 + 113328^2 .

It is not an unprimeable number, because it can be changed into a prime (206541808129) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22406613 + ... + 22415828.

Almost surely, 2^206541808128 is an apocalyptic number.

It is an amenable number.

206541808128 is an abundant number, since it is smaller than the sum of its proper divisors (389551848030).

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

206541808128 is an equidigital number, since it uses as much as digits as its factorization.

206541808128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44822465 (or 44822446 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 206541808128 in words is "two hundred six billion, five hundred forty-one million, eight hundred eight thousand, one hundred twenty-eight".