204909223559 has 2 divisors, whose sum is σ = 204909223560. Its totient is φ = 204909223558.

The previous prime is 204909223523. The next prime is 204909223573. The reversal of 204909223559 is 955322909402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204909223559 - 2⁸ = 204909223303 is a prime.

It is a super-3 number, since 3×204909223559³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204909223759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102454611779 + 102454611780.

It is an arithmetic number, because the mean of its divisors is an integer number (102454611780).

Almost surely, 2^204909223559 is an apocalyptic number.

204909223559 is a deficient number, since it is larger than the sum of its proper divisors (1).

204909223559 is an equidigital number, since it uses as much as digits as its factorization.

204909223559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 204909223559 in words is "two hundred four billion, nine hundred nine million, two hundred twenty-three thousand, five hundred fifty-nine".