25500085643 has 2 divisors, whose sum is σ = 25500085644. Its totient is φ = 25500085642.

The previous prime is 25500085603. The next prime is 25500085691. The reversal of 25500085643 is 34658000552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25500085643 - 2¹⁰ = 25500084619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25500085597 and 25500085606.

It is not a weakly prime, because it can be changed into another prime (25500085603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12750042821 + 12750042822.

It is an arithmetic number, because the mean of its divisors is an integer number (12750042822).

Almost surely, 2^25500085643 is an apocalyptic number.

25500085643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25500085643 is an equidigital number, since it uses as much as digits as its factorization.

25500085643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 25500085643 in words is "twenty-five billion, five hundred million, eighty-five thousand, six hundred forty-three".