25644485 has 4 divisors (see below), whose sum is σ = 30773388. Its totient is φ = 20515584.

The previous prime is 25644467. The next prime is 25644499. The reversal of 25644485 is 58444652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4401604 + 21242881 = 2098^2 + 4609^2 .

It is a cyclic number.

It is not a de Polignac number, because 25644485 - 2¹⁴ = 25628101 is a prime.

It is a super-2 number, since 2×25644485² = 1315279221830450, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2564444 + ... + 2564453.

It is an arithmetic number, because the mean of its divisors is an integer number (7693347).

Almost surely, 2^25644485 is an apocalyptic number.

It is an amenable number.

25644485 is a deficient number, since it is larger than the sum of its proper divisors (5128903).

25644485 is an equidigital number, since it uses as much as digits as its factorization.

25644485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5128902.

The product of its digits is 153600, while the sum is 38.

The square root of 25644485 is about 5064.0384082272. The cubic root of 25644485 is about 294.8931337515.

The spelling of 25644485 in words is "twenty-five million, six hundred forty-four thousand, four hundred eighty-five".