25616345 has 4 divisors (see below), whose sum is σ = 30739620. Its totient is φ = 20493072.

The previous prime is 25616333. The next prime is 25616369. The reversal of 25616345 is 54361652.

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 6370576 + 19245769 = 2524^2 + 4387^2 .

It is a cyclic number.

It is not a de Polignac number, because 25616345 - 2⁴ = 25616329 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2561630 + ... + 2561639.

It is an arithmetic number, because the mean of its divisors is an integer number (7684905).

Almost surely, 2^25616345 is an apocalyptic number.

It is an amenable number.

25616345 is a deficient number, since it is larger than the sum of its proper divisors (5123275).

25616345 is an equidigital number, since it uses as much as digits as its factorization.

25616345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123274.

The product of its digits is 21600, while the sum is 32.

The square root of 25616345 is about 5061.2592306658. The cubic root of 25616345 is about 294.7852310204.

Adding to 25616345 its reverse (54361652), we get a palindrome (79977997).

The spelling of 25616345 in words is "twenty-five million, six hundred sixteen thousand, three hundred forty-five".