205135263547 has 4 divisors (see below), whose sum is σ = 205181794440. Its totient is φ = 205088732656.

The previous prime is 205135263503. The next prime is 205135263601. The reversal of 205135263547 is 745362531502.

It is a happy number.

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-205135263547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205135264547) 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, 23258833 + ... + 23267650.

It is an arithmetic number, because the mean of its divisors is an integer number (51295448610).

Almost surely, 2^205135263547 is an apocalyptic number.

205135263547 is a deficient number, since it is larger than the sum of its proper divisors (46530893).

205135263547 is an equidigital number, since it uses as much as digits as its factorization.

205135263547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46530892.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 205135263547 in words is "two hundred five billion, one hundred thirty-five million, two hundred sixty-three thousand, five hundred forty-seven".