204880204761 has 4 divisors (see below), whose sum is σ = 273173606352. Its totient is φ = 136586803172.

The previous prime is 204880204757. The next prime is 204880204807. The reversal of 204880204761 is 167402088402.

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 204880204761 - 2² = 204880204757 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (204880204721) 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, 34146700791 + ... + 34146700796.

It is an arithmetic number, because the mean of its divisors is an integer number (68293401588).

Almost surely, 2^204880204761 is an apocalyptic number.

It is an amenable number.

204880204761 is a deficient number, since it is larger than the sum of its proper divisors (68293401591).

204880204761 is an equidigital number, since it uses as much as digits as its factorization.

204880204761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68293401590.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 204880204761 in words is "two hundred four billion, eight hundred eighty million, two hundred four thousand, seven hundred sixty-one".