204794718721 has 4 divisors (see below), whose sum is σ = 204796412352. Its totient is φ = 204793025092.

The previous prime is 204794718691. The next prime is 204794718743. The reversal of 204794718721 is 127817497402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204794718721 - 2¹³ = 204794710529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204794718521) 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, 650221 + ... + 912346.

It is an arithmetic number, because the mean of its divisors is an integer number (51199103088).

Almost surely, 2^204794718721 is an apocalyptic number.

It is an amenable number.

204794718721 is a deficient number, since it is larger than the sum of its proper divisors (1693631).

204794718721 is a wasteful number, since it uses less digits than its factorization.

204794718721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693630.

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 204794718721 in words is "two hundred four billion, seven hundred ninety-four million, seven hundred eighteen thousand, seven hundred twenty-one".