206542663285 has 16 divisors (see below), whose sum is σ = 295574098176. Its totient is φ = 135471460608.

The previous prime is 206542663277. The next prime is 206542663289. The reversal of 206542663285 is 582366245602.

It is a cyclic number.

It is not a de Polignac number, because 206542663285 - 2³ = 206542663277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206542663289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128286564 + ... + 128288173.

It is an arithmetic number, because the mean of its divisors is an integer number (18473381136).

Almost surely, 2^206542663285 is an apocalyptic number.

It is an amenable number.

206542663285 is a deficient number, since it is larger than the sum of its proper divisors (89031434891).

206542663285 is a wasteful number, since it uses less digits than its factorization.

206542663285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256574772.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 206542663285 in words is "two hundred six billion, five hundred forty-two million, six hundred sixty-three thousand, two hundred eighty-five".