25048649009 has 2 divisors, whose sum is σ = 25048649010. Its totient is φ = 25048649008.

The previous prime is 25048648987. The next prime is 25048649033. The reversal of 25048649009 is 90094684052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21133018384 + 3915630625 = 145372^2 + 62575^2 .

It is a cyclic number.

It is not a de Polignac number, because 25048649009 - 2²⁰ = 25047600433 is a prime.

It is not a weakly prime, because it can be changed into another prime (25048649809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12524324504 + 12524324505.

It is an arithmetic number, because the mean of its divisors is an integer number (12524324505).

Almost surely, 2^25048649009 is an apocalyptic number.

It is an amenable number.

25048649009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25048649009 is an equidigital number, since it uses as much as digits as its factorization.

25048649009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 25048649009 in words is "twenty-five billion, forty-eight million, six hundred forty-nine thousand, nine".