25563799 has 2 divisors, whose sum is σ = 25563800. Its totient is φ = 25563798.

The previous prime is 25563793. The next prime is 25563803. The reversal of 25563799 is 99736552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25563799 - 2¹⁵ = 25531031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25563793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12781899 + 12781900.

It is an arithmetic number, because the mean of its divisors is an integer number (12781900).

Almost surely, 2^25563799 is an apocalyptic number.

25563799 is a deficient number, since it is larger than the sum of its proper divisors (1).

25563799 is an equidigital number, since it uses as much as digits as its factorization.

25563799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 510300, while the sum is 46.

The square root of 25563799 is about 5056.0655652394. The cubic root of 25563799 is about 294.5835318309.

It can be divided in two parts, 25563 and 799, that added together give a palindrome (26362).

The spelling of 25563799 in words is "twenty-five million, five hundred sixty-three thousand, seven hundred ninety-nine".