25648091 has 4 divisors (see below), whose sum is σ = 29312112. Its totient is φ = 21984072.

The previous prime is 25648057. The next prime is 25648099. The reversal of 25648091 is 19084652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25648091 - 2²² = 21453787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25648099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832000 + ... + 1832013.

It is an arithmetic number, because the mean of its divisors is an integer number (7328028).

Almost surely, 2^25648091 is an apocalyptic number.

25648091 is a deficient number, since it is larger than the sum of its proper divisors (3664021).

25648091 is an equidigital number, since it uses as much as digits as its factorization.

25648091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664020.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 25648091 is about 5064.3944356655. The cubic root of 25648091 is about 294.9069552392.

The spelling of 25648091 in words is "twenty-five million, six hundred forty-eight thousand, ninety-one".