206089307440 has 80 divisors (see below), whose sum is σ = 482771948832. Its totient is φ = 81816256512.

The previous prime is 206089307401. The next prime is 206089307443. The reversal of 206089307440 is 44703980602.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (206089307443) 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, 5677027 + ... + 5713213.

Almost surely, 2^206089307440 is an apocalyptic number.

206089307440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206089307440 is an abundant number, since it is smaller than the sum of its proper divisors (276682641392).

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

206089307440 is a wasteful number, since it uses less digits than its factorization.

206089307440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36734 (or 36728 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 206089307440 in words is "two hundred six billion, eighty-nine million, three hundred seven thousand, four hundred forty".