25361304560509 has 2 divisors, whose sum is σ = 25361304560510. Its totient is φ = 25361304560508.

The previous prime is 25361304560503. The next prime is 25361304560533. The reversal of 25361304560509 is 90506540316352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24860894044900 + 500410515609 = 4986070^2 + 707397^2 .

It is a cyclic number.

It is not a de Polignac number, because 25361304560509 - 2⁷ = 25361304560381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25361304560503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12680652280254 + 12680652280255.

It is an arithmetic number, because the mean of its divisors is an integer number (12680652280255).

Almost surely, 2^{25361304560509} is an apocalyptic number.

It is an amenable number.

25361304560509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361304560509 is an equidigital number, since it uses as much as digits as its factorization.

25361304560509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916000, while the sum is 49.

The spelling of 25361304560509 in words is "twenty-five trillion, three hundred sixty-one billion, three hundred four million, five hundred sixty thousand, five hundred nine".