25641163 has 2 divisors, whose sum is σ = 25641164. Its totient is φ = 25641162.

The previous prime is 25641157. The next prime is 25641181. The reversal of 25641163 is 36114652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25641163 - 2²¹ = 23544011 is a prime.

It is equal to p_1603468 and since 25641163 and 1603468 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25641103) 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, 12820581 + 12820582.

It is an arithmetic number, because the mean of its divisors is an integer number (12820582).

Almost surely, 2^25641163 is an apocalyptic number.

25641163 is a deficient number, since it is larger than the sum of its proper divisors (1).

25641163 is an equidigital number, since it uses as much as digits as its factorization.

25641163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

The square root of 25641163 is about 5063.7103985121. The cubic root of 25641163 is about 294.8803996647.

The spelling of 25641163 in words is "twenty-five million, six hundred forty-one thousand, one hundred sixty-three".