204818690761 has 2 divisors, whose sum is σ = 204818690762. Its totient is φ = 204818690760.

The previous prime is 204818690753. The next prime is 204818690773. The reversal of 204818690761 is 167096818402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196284441600 + 8534249161 = 443040^2 + 92381^2 .

It is a cyclic number.

It is not a de Polignac number, because 204818690761 - 2³ = 204818690753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204818690699 and 204818690708.

It is not a weakly prime, because it can be changed into another prime (204818690161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102409345380 + 102409345381.

It is an arithmetic number, because the mean of its divisors is an integer number (102409345381).

Almost surely, 2^204818690761 is an apocalyptic number.

It is an amenable number.

204818690761 is a deficient number, since it is larger than the sum of its proper divisors (1).

204818690761 is an equidigital number, since it uses as much as digits as its factorization.

204818690761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 204818690761 in words is "two hundred four billion, eight hundred eighteen million, six hundred ninety thousand, seven hundred sixty-one".