204101040865 has 4 divisors (see below), whose sum is σ = 244921249044. Its totient is φ = 163280832688.

The previous prime is 204101040859. The next prime is 204101040887. The reversal of 204101040865 is 568040101402.

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 30031850209 + 174069190656 = 173297^2 + 417216^2 .

It is a cyclic number.

It is not a de Polignac number, because 204101040865 - 2³¹ = 201953557217 is a prime.

It is a Duffinian number.

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, 20410104082 + ... + 20410104091.

It is an arithmetic number, because the mean of its divisors is an integer number (61230312261).

Almost surely, 2^204101040865 is an apocalyptic number.

It is an amenable number.

204101040865 is a deficient number, since it is larger than the sum of its proper divisors (40820208179).

204101040865 is an equidigital number, since it uses as much as digits as its factorization.

204101040865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40820208178.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 204101040865 in words is "two hundred four billion, one hundred one million, forty thousand, eight hundred sixty-five".