206878820202 has 64 divisors (see below), whose sum is σ = 484554960000. Its totient is φ = 65245388544.

The previous prime is 206878820201. The next prime is 206878820227. The reversal of 206878820202 is 202028878602.

It is a happy number.

It is a super-3 number, since 3×206878820202³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (206878820201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 662674 + ... + 923522.

It is an arithmetic number, because the mean of its divisors is an integer number (7571171250).

Almost surely, 2^206878820202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206878820202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242277480000).

206878820202 is an abundant number, since it is smaller than the sum of its proper divisors (277676139798).

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

206878820202 is a wasteful number, since it uses less digits than its factorization.

206878820202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261652 (or 261646 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 206878820202 in words is "two hundred six billion, eight hundred seventy-eight million, eight hundred twenty thousand, two hundred two".