206542124542655 has 16 divisors (see below), whose sum is σ = 270382905512064. Its totient is φ = 150212183141280.

The previous prime is 206542124542619. The next prime is 206542124542681. The reversal of 206542124542655 is 556245421245602.

It is not a de Polignac number, because 206542124542655 - 2²² = 206542120348351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206542124542597 and 206542124542606.

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, 30402392 + ... + 36570338.

It is an arithmetic number, because the mean of its divisors is an integer number (16898931594504).

Almost surely, 2^{206542124542655} is an apocalyptic number.

206542124542655 is a deficient number, since it is larger than the sum of its proper divisors (63840780969409).

206542124542655 is a wasteful number, since it uses less digits than its factorization.

206542124542655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776806.

The product of its (nonzero) digits is 23040000, while the sum is 53.

The spelling of 206542124542655 in words is "two hundred six trillion, five hundred forty-two billion, one hundred twenty-four million, five hundred forty-two thousand, six hundred fifty-five".