205453505105 has 16 divisors (see below), whose sum is σ = 250194680064. Its totient is φ = 161939950080.

The previous prime is 205453505071. The next prime is 205453505119. The reversal of 205453505105 is 501505354502.

It is not a de Polignac number, because 205453505105 - 2¹² = 205453501009 is a prime.

It is a super-2 number, since 2×205453505105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522176 + ... + 826785.

It is an arithmetic number, because the mean of its divisors is an integer number (15637167504).

Almost surely, 2^205453505105 is an apocalyptic number.

It is an amenable number.

205453505105 is a deficient number, since it is larger than the sum of its proper divisors (44741174959).

205453505105 is a wasteful number, since it uses less digits than its factorization.

205453505105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349416.

The product of its (nonzero) digits is 75000, while the sum is 35.

Adding to 205453505105 its reverse (501505354502), we get a palindrome (706958859607).

The spelling of 205453505105 in words is "two hundred five billion, four hundred fifty-three million, five hundred five thousand, one hundred five".