204995765843 has 8 divisors (see below), whose sum is σ = 225479942256. Its totient is φ = 186359785920.

The previous prime is 204995765831. The next prime is 204995765881. The reversal of 204995765843 is 348567599402.

It is not a de Polignac number, because 204995765843 - 2¹⁶ = 204995700307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204995762843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77006846 + ... + 77009507.

It is an arithmetic number, because the mean of its divisors is an integer number (28184992782).

Almost surely, 2^204995765843 is an apocalyptic number.

204995765843 is a deficient number, since it is larger than the sum of its proper divisors (20484176413).

204995765843 is an equidigital number, since it uses as much as digits as its factorization.

204995765843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154016386 (or 154016364 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 204995765843 in words is "two hundred four billion, nine hundred ninety-five million, seven hundred sixty-five thousand, eight hundred forty-three".