204491476813 has 8 divisors (see below), whose sum is σ = 220225220768. Its totient is φ = 188758251504.

The previous prime is 204491476793. The next prime is 204491476859. The reversal of 204491476813 is 318674194402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204491476813 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 (204491426813) 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, 1176970 + ... + 1339492.

It is an arithmetic number, because the mean of its divisors is an integer number (27528152596).

Almost surely, 2^204491476813 is an apocalyptic number.

It is an amenable number.

204491476813 is a deficient number, since it is larger than the sum of its proper divisors (15733743955).

204491476813 is a wasteful number, since it uses less digits than its factorization.

204491476813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259323.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 204491476813 in words is "two hundred four billion, four hundred ninety-one million, four hundred seventy-six thousand, eight hundred thirteen".