25163045009 has 2 divisors, whose sum is σ = 25163045010. Its totient is φ = 25163045008.

The previous prime is 25163044993. The next prime is 25163045059. The reversal of 25163045009 is 90054036152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24080832400 + 1082212609 = 155180^2 + 32897^2 .

It is a cyclic number.

It is not a de Polignac number, because 25163045009 - 2⁴ = 25163044993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25163045009.

It is not a weakly prime, because it can be changed into another prime (25163045059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12581522504 + 12581522505.

It is an arithmetic number, because the mean of its divisors is an integer number (12581522505).

Almost surely, 2^25163045009 is an apocalyptic number.

It is an amenable number.

25163045009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25163045009 is an equidigital number, since it uses as much as digits as its factorization.

25163045009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 25163045009 in words is "twenty-five billion, one hundred sixty-three million, forty-five thousand, nine".