25680785 has 8 divisors (see below), whose sum is σ = 33187560. Its totient is φ = 18964224.

The previous prime is 25680763. The next prime is 25680791. The reversal of 25680785 is 58708652.

It can be written as a sum of positive squares in 4 ways, for example, as 2650384 + 23030401 = 1628^2 + 4799^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 25680785 - 2¹² = 25676689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197480 + ... + 197609.

It is an arithmetic number, because the mean of its divisors is an integer number (4148445).

Almost surely, 2^25680785 is an apocalyptic number.

It is an amenable number.

25680785 is a deficient number, since it is larger than the sum of its proper divisors (7506775).

25680785 is a wasteful number, since it uses less digits than its factorization.

25680785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395107.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 25680785 is about 5067.6212368329. The cubic root of 25680785 is about 295.0322094487.

The spelling of 25680785 in words is "twenty-five million, six hundred eighty thousand, seven hundred eighty-five".