206642651024 has 80 divisors (see below), whose sum is σ = 438635675520. Its totient is φ = 93996672000.

The previous prime is 206642651011. The next prime is 206642651029. The reversal of 206642651024 is 420156246602.

It is not an unprimeable number, because it can be changed into a prime (206642651029) 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, 570524 + ... + 859524.

It is an arithmetic number, because the mean of its divisors is an integer number (5482945944).

Almost surely, 2^206642651024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206642651024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219317837760).

206642651024 is an abundant number, since it is smaller than the sum of its proper divisors (231993024496).

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

206642651024 is a wasteful number, since it uses less digits than its factorization.

206642651024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289128 (or 289122 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 206642651024 its reverse (420156246602), we get a palindrome (626798897626).

The spelling of 206642651024 in words is "two hundred six billion, six hundred forty-two million, six hundred fifty-one thousand, twenty-four".