209689476046 has 8 divisors (see below), whose sum is σ = 316024898184. Its totient is φ = 104347843320.

The previous prime is 209689476041. The next prime is 209689476097. The reversal of 209689476046 is 640674986902.

209689476046 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209689476041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248446825 + ... + 248447668.

It is an arithmetic number, because the mean of its divisors is an integer number (39503112273).

Almost surely, 2^209689476046 is an apocalyptic number.

209689476046 is a deficient number, since it is larger than the sum of its proper divisors (106335422138).

209689476046 is a wasteful number, since it uses less digits than its factorization.

209689476046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496894706.

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 209689476046 in words is "two hundred nine billion, six hundred eighty-nine million, four hundred seventy-six thousand, forty-six".