206648344478 has 16 divisors (see below), whose sum is σ = 322037473680. Its totient is φ = 99333103296.

The previous prime is 206648344477. The next prime is 206648344481. The reversal of 206648344478 is 874443846602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206648344477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7632200 + ... + 7659227.

It is an arithmetic number, because the mean of its divisors is an integer number (20127342105).

Almost surely, 2^206648344478 is an apocalyptic number.

206648344478 is a deficient number, since it is larger than the sum of its proper divisors (115389129202).

206648344478 is a wasteful number, since it uses less digits than its factorization.

206648344478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15291691.

The product of its (nonzero) digits is 24772608, while the sum is 56.

The spelling of 206648344478 in words is "two hundred six billion, six hundred forty-eight million, three hundred forty-four thousand, four hundred seventy-eight".