206556655602 has 128 divisors (see below), whose sum is σ = 489820006656. Its totient is φ = 57369600000.

The previous prime is 206556655597. The next prime is 206556655603.

206556655602 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (206556655603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6897702 + ... + 6927582.

It is an arithmetic number, because the mean of its divisors is an integer number (3826718802).

Almost surely, 2^206556655602 is an apocalyptic number.

206556655602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 206556655602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244910003328).

206556655602 is an abundant number, since it is smaller than the sum of its proper divisors (283263351054).

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

206556655602 is a wasteful number, since it uses less digits than its factorization.

206556655602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30076.

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 206556655602 in words is "two hundred six billion, five hundred fifty-six million, six hundred fifty-five thousand, six hundred two".