204255230661 has 8 divisors (see below), whose sum is σ = 302600341760. Its totient is φ = 136170153756.

The previous prime is 204255230657. The next prime is 204255230677. The reversal of 204255230661 is 166032552402.

204255230661 is a `hidden beast` number, since 2 + 0 + 42 + 552 + 3 + 0 + 6 + 61 = 666.

It is not a de Polignac number, because 204255230661 - 2² = 204255230657 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 (204255230611) 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 7 ways as a sum of consecutive naturals, for example, 3782504245 + ... + 3782504298.

It is an arithmetic number, because the mean of its divisors is an integer number (37825042720).

Almost surely, 2^204255230661 is an apocalyptic number.

It is an amenable number.

204255230661 is a deficient number, since it is larger than the sum of its proper divisors (98345111099).

204255230661 is an equidigital number, since it uses as much as digits as its factorization.

204255230661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7565008552 (or 7565008546 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 204255230661 in words is "two hundred four billion, two hundred fifty-five million, two hundred thirty thousand, six hundred sixty-one".