25663441 has 4 divisors (see below), whose sum is σ = 25685812. Its totient is φ = 25641072.

The previous prime is 25663399. The next prime is 25663481. The reversal of 25663441 is 14436652.

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 863041 + 24800400 = 929^2 + 4980^2 .

It is a cyclic number.

It is not a de Polignac number, because 25663441 - 2⁹ = 25662929 is a prime.

It is a super-2 number, since 2×25663441² = 1317224407920962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25663481) 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, 9366 + ... + 11791.

It is an arithmetic number, because the mean of its divisors is an integer number (6421453).

Almost surely, 2^25663441 is an apocalyptic number.

It is an amenable number.

25663441 is a deficient number, since it is larger than the sum of its proper divisors (22371).

25663441 is a wasteful number, since it uses less digits than its factorization.

25663441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22370.

The product of its digits is 17280, while the sum is 31.

The square root of 25663441 is about 5065.9096912598. The cubic root of 25663441 is about 294.9657759780.

The spelling of 25663441 in words is "twenty-five million, six hundred sixty-three thousand, four hundred forty-one".