206401533355 has 4 divisors (see below), whose sum is σ = 247681840032. Its totient is φ = 165121226680.

The previous prime is 206401533293. The next prime is 206401533379. The reversal of 206401533355 is 553335104602.

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

It is not a de Polignac number, because 206401533355 - 2¹⁷ = 206401402283 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20640153331 + ... + 20640153340.

It is an arithmetic number, because the mean of its divisors is an integer number (61920460008).

Almost surely, 2^206401533355 is an apocalyptic number.

206401533355 is a deficient number, since it is larger than the sum of its proper divisors (41280306677).

206401533355 is an equidigital number, since it uses as much as digits as its factorization.

206401533355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41280306676.

The product of its (nonzero) digits is 162000, while the sum is 37.

Adding to 206401533355 its reverse (553335104602), we get a palindrome (759736637957).

The spelling of 206401533355 in words is "two hundred six billion, four hundred one million, five hundred thirty-three thousand, three hundred fifty-five".