209095043806 has 16 divisors (see below), whose sum is σ = 342168323328. Its totient is φ = 95039647000.

The previous prime is 209095043789. The next prime is 209095043809. The reversal of 209095043806 is 608340590902.

209095043806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209095043809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477531 + ... + 803881.

It is an arithmetic number, because the mean of its divisors is an integer number (21385520208).

Almost surely, 2^209095043806 is an apocalyptic number.

209095043806 is a deficient number, since it is larger than the sum of its proper divisors (133073279522).

209095043806 is a wasteful number, since it uses less digits than its factorization.

209095043806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355487.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 209095043806 in words is "two hundred nine billion, ninety-five million, forty-three thousand, eight hundred six".