25608761 has 4 divisors (see below), whose sum is σ = 25649232. Its totient is φ = 25568292.

The previous prime is 25608757. The next prime is 25608763. The reversal of 25608761 is 16780652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25608761 - 2² = 25608757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25608763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19271 + ... + 20556.

It is an arithmetic number, because the mean of its divisors is an integer number (6412308).

Almost surely, 2^25608761 is an apocalyptic number.

It is an amenable number.

25608761 is a deficient number, since it is larger than the sum of its proper divisors (40471).

25608761 is an equidigital number, since it uses as much as digits as its factorization.

25608761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40470.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 25608761 is about 5060.5099545402. The cubic root of 25608761 is about 294.7561366816.

The spelling of 25608761 in words is "twenty-five million, six hundred eight thousand, seven hundred sixty-one".