205640152206 has 8 divisors (see below), whose sum is σ = 411280304424. Its totient is φ = 68546717400.

The previous prime is 205640152181. The next prime is 205640152241. The reversal of 205640152206 is 602251046502.

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

205640152206 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17136679345 + ... + 17136679356.

It is an arithmetic number, because the mean of its divisors is an integer number (51410038053).

Almost surely, 2^205640152206 is an apocalyptic number.

205640152206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

205640152206 is a wasteful number, since it uses less digits than its factorization.

205640152206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34273358706.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 205640152206 its reverse (602251046502), we get a palindrome (807891198708).

The spelling of 205640152206 in words is "two hundred five billion, six hundred forty million, one hundred fifty-two thousand, two hundred six".