205234602554011 has 4 divisors (see below), whose sum is σ = 205234638099472. Its totient is φ = 205234567008552.

The previous prime is 205234602553987. The next prime is 205234602554053. The reversal of 205234602554011 is 110455206432502.

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

It is a cyclic number.

It is not a de Polignac number, because 205234602554011 - 2²¹ = 205234600456859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205234602557011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6891135 + ... + 21399928.

It is an arithmetic number, because the mean of its divisors is an integer number (51308659524868).

Almost surely, 2^{205234602554011} is an apocalyptic number.

205234602554011 is a deficient number, since it is larger than the sum of its proper divisors (35545461).

205234602554011 is an equidigital number, since it uses as much as digits as its factorization.

205234602554011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35545460.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 205234602554011 its reverse (110455206432502), we get a palindrome (315689808986513).

The spelling of 205234602554011 in words is "two hundred five trillion, two hundred thirty-four billion, six hundred two million, five hundred fifty-four thousand, eleven".