206206261153 has 4 divisors (see below), whose sum is σ = 206210051908. Its totient is φ = 206202470400.

The previous prime is 206206261111. The next prime is 206206261159. The reversal of 206206261153 is 351162602602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29829780369 + 176376480784 = 172713^2 + 419972^2 .

It is a cyclic number.

It is not a de Polignac number, because 206206261153 - 2³³ = 197616326561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206206261159) 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 3 ways as a sum of consecutive naturals, for example, 1812576 + ... + 1922977.

It is an arithmetic number, because the mean of its divisors is an integer number (51552512977).

Almost surely, 2^206206261153 is an apocalyptic number.

It is an amenable number.

206206261153 is a deficient number, since it is larger than the sum of its proper divisors (3790755).

206206261153 is an equidigital number, since it uses as much as digits as its factorization.

206206261153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3790754.

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 206206261153 its reverse (351162602602), we get a palindrome (557368863755).

The spelling of 206206261153 in words is "two hundred six billion, two hundred six million, two hundred sixty-one thousand, one hundred fifty-three".