205045504505 has 16 divisors (see below), whose sum is σ = 271855730304. Its totient is φ = 147674714880.

The previous prime is 205045504501. The next prime is 205045504511. The reversal of 205045504505 is 505405540502.

It is not a de Polignac number, because 205045504505 - 2² = 205045504501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205045504501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52439351 + ... + 52443260.

It is an arithmetic number, because the mean of its divisors is an integer number (16990983144).

Almost surely, 2^205045504505 is an apocalyptic number.

It is an amenable number.

205045504505 is a deficient number, since it is larger than the sum of its proper divisors (66810225799).

205045504505 is a wasteful number, since it uses less digits than its factorization.

205045504505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104882656.

The product of its (nonzero) digits is 100000, while the sum is 35.

The spelling of 205045504505 in words is "two hundred five billion, forty-five million, five hundred four thousand, five hundred five".