205304880279 has 4 divisors (see below), whose sum is σ = 273739840376. Its totient is φ = 136869920184.

The previous prime is 205304880259. The next prime is 205304880307. The reversal of 205304880279 is 972088403502.

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

It is not a de Polignac number, because 205304880279 - 2¹⁵ = 205304847511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205304880259) 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, 34217480044 + ... + 34217480049.

It is an arithmetic number, because the mean of its divisors is an integer number (68434960094).

Almost surely, 2^205304880279 is an apocalyptic number.

205304880279 is a deficient number, since it is larger than the sum of its proper divisors (68434960097).

205304880279 is an equidigital number, since it uses as much as digits as its factorization.

205304880279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68434960096.

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 205304880279 in words is "two hundred five billion, three hundred four million, eight hundred eighty thousand, two hundred seventy-nine".