204570507949 has 2 divisors, whose sum is σ = 204570507950. Its totient is φ = 204570507948.

The previous prime is 204570507929. The next prime is 204570507971. The reversal of 204570507949 is 949705075402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200128285449 + 4442222500 = 447357^2 + 66650^2 .

It is a cyclic number.

It is not a de Polignac number, because 204570507949 - 2¹⁵ = 204570475181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204570507896 and 204570507905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204570507929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102285253974 + 102285253975.

It is an arithmetic number, because the mean of its divisors is an integer number (102285253975).

Almost surely, 2^204570507949 is an apocalyptic number.

It is an amenable number.

204570507949 is a deficient number, since it is larger than the sum of its proper divisors (1).

204570507949 is an equidigital number, since it uses as much as digits as its factorization.

204570507949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 204570507949 in words is "two hundred four billion, five hundred seventy million, five hundred seven thousand, nine hundred forty-nine".