205659352039 has 4 divisors (see below), whose sum is σ = 206248634200. Its totient is φ = 205070069880.

The previous prime is 205659352009. The next prime is 205659352043. The reversal of 205659352039 is 930253956502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205659352039 is a prime.

It is a super-2 number, since 2×205659352039² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205659351983 and 205659352001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205659352009) 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, 294640557 + ... + 294641254.

It is an arithmetic number, because the mean of its divisors is an integer number (51562158550).

Almost surely, 2^205659352039 is an apocalyptic number.

205659352039 is a deficient number, since it is larger than the sum of its proper divisors (589282161).

205659352039 is an equidigital number, since it uses as much as digits as its factorization.

205659352039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589282160.

The product of its (nonzero) digits is 2187000, while the sum is 49.

The spelling of 205659352039 in words is "two hundred five billion, six hundred fifty-nine million, three hundred fifty-two thousand, thirty-nine".