2545216609 has 8 divisors (see below), whose sum is σ = 2741394600. Its totient is φ = 2349094656.

The previous prime is 2545216579. The next prime is 2545216621. The reversal of 2545216609 is 9066125452.

It can be written as a sum of positive squares in 4 ways, for example, as 1221712209 + 1323504400 = 34953^2 + 36380^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2545216609 - 2¹¹ = 2545214561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545246609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167667 + ... + 182215.

It is an arithmetic number, because the mean of its divisors is an integer number (342674325).

Almost surely, 2^2545216609 is an apocalyptic number.

It is an amenable number.

2545216609 is a deficient number, since it is larger than the sum of its proper divisors (196177991).

2545216609 is a wasteful number, since it uses less digits than its factorization.

2545216609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28019.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 2545216609 is about 50450.1398313226. The cubic root of 2545216609 is about 1365.3424177294.

The spelling of 2545216609 in words is "two billion, five hundred forty-five million, two hundred sixteen thousand, six hundred nine".