205654534553 has 12 divisors (see below), whose sum is σ = 222707401488. Its totient is φ = 189820977840.

The previous prime is 205654534487. The next prime is 205654534567. The reversal of 205654534553 is 355435456502.

It is not a de Polignac number, because 205654534553 - 2¹⁰ = 205654533529 is a prime.

It is a super-2 number, since 2×205654534553² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205654534498 and 205654534507.

It is not an unprimeable number, because it can be changed into a prime (205654534453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2784326 + ... + 2857232.

It is an arithmetic number, because the mean of its divisors is an integer number (18558950124).

Almost surely, 2^205654534553 is an apocalyptic number.

It is an amenable number.

205654534553 is a deficient number, since it is larger than the sum of its proper divisors (17052866935).

205654534553 is a wasteful number, since it uses less digits than its factorization.

205654534553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89624 (or 89611 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 47.

The spelling of 205654534553 in words is "two hundred five billion, six hundred fifty-four million, five hundred thirty-four thousand, five hundred fifty-three".