25656571163 has 2 divisors, whose sum is σ = 25656571164. Its totient is φ = 25656571162.

The previous prime is 25656571159. The next prime is 25656571177. The reversal of 25656571163 is 36117565652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25656571163 - 2² = 25656571159 is a prime.

It is not a weakly prime, because it can be changed into another prime (25656571463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12828285581 + 12828285582.

It is an arithmetic number, because the mean of its divisors is an integer number (12828285582).

Almost surely, 2^25656571163 is an apocalyptic number.

25656571163 is a deficient number, since it is larger than the sum of its proper divisors (1).

25656571163 is an equidigital number, since it uses as much as digits as its factorization.

25656571163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 47.

The spelling of 25656571163 in words is "twenty-five billion, six hundred fifty-six million, five hundred seventy-one thousand, one hundred sixty-three".