204234853517 has 8 divisors (see below), whose sum is σ = 205234236792. Its totient is φ = 203237798400.

The previous prime is 204234853507. The next prime is 204234853541. The reversal of 204234853517 is 715358432402.

204234853517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 535181956 + 203699671561 = 23134^2 + 451331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204234853517 - 2⁸ = 204234853261 is a prime.

It is a super-2 number, since 2×204234853517² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204234853507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 406034 + ... + 757187.

It is an arithmetic number, because the mean of its divisors is an integer number (25654279599).

Almost surely, 2^204234853517 is an apocalyptic number.

It is an amenable number.

204234853517 is a deficient number, since it is larger than the sum of its proper divisors (999383275).

204234853517 is a wasteful number, since it uses less digits than its factorization.

204234853517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164079.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 204234853517 in words is "two hundred four billion, two hundred thirty-four million, eight hundred fifty-three thousand, five hundred seventeen".