204139415009 has 2 divisors, whose sum is σ = 204139415010. Its totient is φ = 204139415008.

The previous prime is 204139414949. The next prime is 204139415071. The reversal of 204139415009 is 900514931402.

204139415009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203509254400 + 630160609 = 451120^2 + 25103^2 .

It is a cyclic number.

It is not a de Polignac number, because 204139415009 - 2¹² = 204139410913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (204139415209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102069707504 + 102069707505.

It is an arithmetic number, because the mean of its divisors is an integer number (102069707505).

Almost surely, 2^204139415009 is an apocalyptic number.

It is an amenable number.

204139415009 is a deficient number, since it is larger than the sum of its proper divisors (1).

204139415009 is an equidigital number, since it uses as much as digits as its factorization.

204139415009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 204139415009 in words is "two hundred four billion, one hundred thirty-nine million, four hundred fifteen thousand, nine".