205206105606 has 32 divisors (see below), whose sum is σ = 420481152000. Its totient is φ = 66724345920.

The previous prime is 205206105553. The next prime is 205206105619. The reversal of 205206105606 is 606501602502.

It is a happy number.

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, 1824595 + ... + 1933793.

It is an arithmetic number, because the mean of its divisors is an integer number (13140036000).

Almost surely, 2^205206105606 is an apocalyptic number.

205206105606 is an abundant number, since it is smaller than the sum of its proper divisors (215275046394).

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

205206105606 is a wasteful number, since it uses less digits than its factorization.

205206105606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116884.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 205206105606 in words is "two hundred five billion, two hundred six million, one hundred five thousand, six hundred six".