25803681 has 8 divisors (see below), whose sum is σ = 34791840. Its totient is φ = 17008992.

The previous prime is 25803667. The next prime is 25803683. The reversal of 25803681 is 18630852.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25803681 - 2¹⁰ = 25802657 is a prime.

It is a super-2 number, since 2×25803681² = 1331659906299522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25803683) 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 in 7 ways as a sum of consecutive naturals, for example, 48055 + ... + 48588.

It is an arithmetic number, because the mean of its divisors is an integer number (4348980).

Almost surely, 2^25803681 is an apocalyptic number.

It is an amenable number.

25803681 is a deficient number, since it is larger than the sum of its proper divisors (8988159).

25803681 is an equidigital number, since it uses as much as digits as its factorization.

25803681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96735.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 25803681 is about 5079.7323748402. The cubic root of 25803681 is about 295.5020885615.

The spelling of 25803681 in words is "twenty-five million, eight hundred three thousand, six hundred eighty-one".