2505045509 has 2 divisors, whose sum is σ = 2505045510. Its totient is φ = 2505045508.

The previous prime is 2505045503. The next prime is 2505045547. The reversal of 2505045509 is 9055405052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2477849284 + 27196225 = 49778^2 + 5215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505045509 is a prime.

It is a super-2 number, since 2×2505045509² = 12550506004322138162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2505045503) 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 as a sum of consecutive naturals, namely, 1252522754 + 1252522755.

It is an arithmetic number, because the mean of its divisors is an integer number (1252522755).

Almost surely, 2^2505045509 is an apocalyptic number.

It is an amenable number.

2505045509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505045509 is an equidigital number, since it uses as much as digits as its factorization.

2505045509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 2505045509 is about 50050.4296584954. The cubic root of 2505045509 is about 1358.1212359851.

The spelling of 2505045509 in words is "two billion, five hundred five million, forty-five thousand, five hundred nine".