205535143032545 has 4 divisors (see below), whose sum is σ = 246642171639060. Its totient is φ = 164428114426032.

The previous prime is 205535143032533. The next prime is 205535143032551. The reversal of 205535143032545 is 545230341535502.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 89791714270801 + 115743428761744 = 9475849^2 + 10758412^2 .

It is a cyclic number.

It is not a de Polignac number, because 205535143032545 - 2⁴ = 205535143032529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205535143032545.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20553514303250 + ... + 20553514303259.

It is an arithmetic number, because the mean of its divisors is an integer number (61660542909765).

Almost surely, 2^{205535143032545} is an apocalyptic number.

It is an amenable number.

205535143032545 is a deficient number, since it is larger than the sum of its proper divisors (41107028606515).

205535143032545 is an equidigital number, since it uses as much as digits as its factorization.

205535143032545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41107028606514.

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

The spelling of 205535143032545 in words is "two hundred five trillion, five hundred thirty-five billion, one hundred forty-three million, thirty-two thousand, five hundred forty-five".