204117051447 has 12 divisors (see below), whose sum is σ = 294860853144. Its totient is φ = 136066444080.

The previous prime is 204117051401. The next prime is 204117051449. The reversal of 204117051447 is 744150711402.

204117051447 is a `hidden beast` number, since 2 + 0 + 41 + 170 + 5 + 1 + 447 = 666.

It is not a de Polignac number, because 204117051447 - 2¹⁹ = 204116527159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204117051449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 853629 + ... + 1066262.

It is an arithmetic number, because the mean of its divisors is an integer number (24571737762).

Almost surely, 2^204117051447 is an apocalyptic number.

204117051447 is a deficient number, since it is larger than the sum of its proper divisors (90743801697).

204117051447 is a wasteful number, since it uses less digits than its factorization.

204117051447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931710 (or 1931707 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

Adding to 204117051447 its reverse (744150711402), we get a palindrome (948267762849).

The spelling of 204117051447 in words is "two hundred four billion, one hundred seventeen million, fifty-one thousand, four hundred forty-seven".