204539653469 has 2 divisors, whose sum is σ = 204539653470. Its totient is φ = 204539653468.

The previous prime is 204539653459. The next prime is 204539653567. The reversal of 204539653469 is 964356935402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166188306244 + 38351347225 = 407662^2 + 195835^2 .

It is a cyclic number.

It is not a de Polignac number, because 204539653469 - 2¹² = 204539649373 is a prime.

It is a super-2 number, since 2×204539653469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204539653459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102269826734 + 102269826735.

It is an arithmetic number, because the mean of its divisors is an integer number (102269826735).

Almost surely, 2^204539653469 is an apocalyptic number.

It is an amenable number.

204539653469 is a deficient number, since it is larger than the sum of its proper divisors (1).

204539653469 is an equidigital number, since it uses as much as digits as its factorization.

204539653469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20995200, while the sum is 56.

The spelling of 204539653469 in words is "two hundred four billion, five hundred thirty-nine million, six hundred fifty-three thousand, four hundred sixty-nine".