205634700045 has 12 divisors (see below), whose sum is σ = 356433480156. Its totient is φ = 109671840000.

The previous prime is 205634699951. The next prime is 205634700067. The reversal of 205634700045 is 540007436502.

205634700045 is a `hidden beast` number, since 20 + 563 + 4 + 70 + 0 + 0 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 105223033161 + 100411666884 = 324381^2 + 316878^2 .

It is not a de Polignac number, because 205634700045 - 2¹³ = 205634691853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205634699982 and 205634700009.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2284829956 + ... + 2284830045.

It is an arithmetic number, because the mean of its divisors is an integer number (29702790013).

Almost surely, 2^205634700045 is an apocalyptic number.

It is an amenable number.

205634700045 is a deficient number, since it is larger than the sum of its proper divisors (150798780111).

205634700045 is a wasteful number, since it uses less digits than its factorization.

205634700045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4569660012 (or 4569660009 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 36.

The spelling of 205634700045 in words is "two hundred five billion, six hundred thirty-four million, seven hundred thousand, forty-five".