206552165557 has 8 divisors (see below), whose sum is σ = 212157322112. Its totient is φ = 200948202000.

The previous prime is 206552165531. The next prime is 206552165587. The reversal of 206552165557 is 755561255602.

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

It is a cyclic number.

It is not a de Polignac number, because 206552165557 - 2⁷ = 206552165429 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206552165557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206552165527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58432 + ... + 645382.

It is an arithmetic number, because the mean of its divisors is an integer number (26519665264).

Almost surely, 2^206552165557 is an apocalyptic number.

It is an amenable number.

206552165557 is a deficient number, since it is larger than the sum of its proper divisors (5605156555).

206552165557 is an equidigital number, since it uses as much as digits as its factorization.

206552165557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596499.

The product of its (nonzero) digits is 3150000, while the sum is 49.

The spelling of 206552165557 in words is "two hundred six billion, five hundred fifty-two million, one hundred sixty-five thousand, five hundred fifty-seven".