204529200409 has 2 divisors, whose sum is σ = 204529200410. Its totient is φ = 204529200408.

The previous prime is 204529200397. The next prime is 204529200443. The reversal of 204529200409 is 904002925402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186621408009 + 17907792400 = 431997^2 + 133820^2 .

It is a cyclic number.

It is not a de Polignac number, because 204529200409 - 2¹¹ = 204529198361 is a prime.

It is not a weakly prime, because it can be changed into another prime (204529200809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102264600204 + 102264600205.

It is an arithmetic number, because the mean of its divisors is an integer number (102264600205).

Almost surely, 2^204529200409 is an apocalyptic number.

It is an amenable number.

204529200409 is a deficient number, since it is larger than the sum of its proper divisors (1).

204529200409 is an equidigital number, since it uses as much as digits as its factorization.

204529200409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 204529200409 in words is "two hundred four billion, five hundred twenty-nine million, two hundred thousand, four hundred nine".