25305216606 has 24 divisors (see below), whose sum is σ = 54831773880. Its totient is φ = 8434486896.

The previous prime is 25305216577. The next prime is 25305216623. The reversal of 25305216606 is 60661250352.

It is a happy number.

25305216606 is a `hidden beast` number, since 2 + 5 + 30 + 5 + 2 + 16 + 606 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276436 + ... + 356408.

It is an arithmetic number, because the mean of its divisors is an integer number (2284657245).

Almost surely, 2^25305216606 is an apocalyptic number.

25305216606 is an abundant number, since it is smaller than the sum of its proper divisors (29526557274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25305216606 is a wasteful number, since it uses less digits than its factorization.

25305216606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97560 (or 97557 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 25305216606 its reverse (60661250352), we get a palindrome (85966466958).

The spelling of 25305216606 in words is "twenty-five billion, three hundred five million, two hundred sixteen thousand, six hundred six".