25563445 has 8 divisors (see below), whose sum is σ = 30704544. Its totient is φ = 20431824.

The previous prime is 25563431. The next prime is 25563451. The reversal of 25563445 is 54436552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25563445 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25563445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6802 + ... + 9868.

It is an arithmetic number, because the mean of its divisors is an integer number (3838068).

Almost surely, 2^25563445 is an apocalyptic number.

It is an amenable number.

25563445 is a deficient number, since it is larger than the sum of its proper divisors (5141099).

25563445 is a wasteful number, since it uses less digits than its factorization.

25563445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739.

The product of its digits is 72000, while the sum is 34.

The square root of 25563445 is about 5056.0305576608. The cubic root of 25563445 is about 294.5821720558.

Adding to 25563445 its reverse (54436552), we get a palindrome (79999997).

The spelling of 25563445 in words is "twenty-five million, five hundred sixty-three thousand, four hundred forty-five".