206106555605 has 16 divisors (see below), whose sum is σ = 248288716800. Its totient is φ = 164245896192.

The previous prime is 206106555533. The next prime is 206106555619. The reversal of 206106555605 is 506555601602.

It is a cyclic number.

It is not a de Polignac number, because 206106555605 - 2¹² = 206106551509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287092 + ... + 1438338.

It is an arithmetic number, because the mean of its divisors is an integer number (15518044800).

Almost surely, 2^206106555605 is an apocalyptic number.

It is an amenable number.

206106555605 is a deficient number, since it is larger than the sum of its proper divisors (42182161195).

206106555605 is a wasteful number, since it uses less digits than its factorization.

206106555605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152308.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 206106555605 in words is "two hundred six billion, one hundred six million, five hundred fifty-five thousand, six hundred five".