25664263 has 2 divisors, whose sum is σ = 25664264. Its totient is φ = 25664262.

The previous prime is 25664257. The next prime is 25664267. The reversal of 25664263 is 36246652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25664263 - 2⁹ = 25663751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25664267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832131 + 12832132.

It is an arithmetic number, because the mean of its divisors is an integer number (12832132).

Almost surely, 2^25664263 is an apocalyptic number.

25664263 is a deficient number, since it is larger than the sum of its proper divisors (1).

25664263 is an equidigital number, since it uses as much as digits as its factorization.

25664263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 34.

The square root of 25664263 is about 5065.9908211524. The cubic root of 25664263 is about 294.9689251956.

The spelling of 25664263 in words is "twenty-five million, six hundred sixty-four thousand, two hundred sixty-three".