204516207261 has 64 divisors (see below), whose sum is σ = 334976083200. Its totient is φ = 122740144128.

The previous prime is 204516207209. The next prime is 204516207263. The reversal of 204516207261 is 162702615402.

It is a happy number.

204516207261 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 1 + 620 + 7 + 26 + 1 = 666.

It is not a de Polignac number, because 204516207261 - 2⁹ = 204516206749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204516207263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1352481 + ... + 1496073.

It is an arithmetic number, because the mean of its divisors is an integer number (5234001300).

Almost surely, 2^204516207261 is an apocalyptic number.

It is an amenable number.

204516207261 is a deficient number, since it is larger than the sum of its proper divisors (130459875939).

204516207261 is a wasteful number, since it uses less digits than its factorization.

204516207261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143755 (or 143749 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 204516207261 in words is "two hundred four billion, five hundred sixteen million, two hundred seven thousand, two hundred sixty-one".