25640585 has 8 divisors (see below), whose sum is σ = 31202496. Its totient is φ = 20223280.

The previous prime is 25640581. The next prime is 25640591. The reversal of 25640585 is 58504652.

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

It is not a de Polignac number, because 25640585 - 2² = 25640581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25640581) 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, 35759 + ... + 36468.

It is an arithmetic number, because the mean of its divisors is an integer number (3900312).

Almost surely, 2^25640585 is an apocalyptic number.

It is an amenable number.

25640585 is a deficient number, since it is larger than the sum of its proper divisors (5561911).

25640585 is an equidigital number, since it uses as much as digits as its factorization.

25640585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72303.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 25640585 is about 5063.6533254163. The cubic root of 25640585 is about 294.8781839286.

The spelling of 25640585 in words is "twenty-five million, six hundred forty thousand, five hundred eighty-five".