2573665709 has 2 divisors, whose sum is σ = 2573665710. Its totient is φ = 2573665708.

The previous prime is 2573665687. The next prime is 2573665733. The reversal of 2573665709 is 9075663752.

2573665709 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., 1907767684 + 665898025 = 43678^2 + 25805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2573665709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2573665769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286832854 + 1286832855.

It is an arithmetic number, because the mean of its divisors is an integer number (1286832855).

Almost surely, 2^2573665709 is an apocalyptic number.

It is an amenable number.

2573665709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2573665709 is an equidigital number, since it uses as much as digits as its factorization.

2573665709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2381400, while the sum is 50.

The square root of 2573665709 is about 50731.3089620207. The cubic root of 2573665709 is about 1370.4106089804.

The spelling of 2573665709 in words is "two billion, five hundred seventy-three million, six hundred sixty-five thousand, seven hundred nine".