25605343317 has 16 divisors (see below), whose sum is σ = 35571816000. Its totient is φ = 16363019904.

The previous prime is 25605343279. The next prime is 25605343319. The reversal of 25605343317 is 71334350652.

It is not a de Polignac number, because 25605343317 - 2⁷ = 25605343189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25605343319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1046592 + ... + 1070777.

It is an arithmetic number, because the mean of its divisors is an integer number (2223238500).

Almost surely, 2^25605343317 is an apocalyptic number.

It is an amenable number.

25605343317 is a deficient number, since it is larger than the sum of its proper divisors (9966472683).

25605343317 is a wasteful number, since it uses less digits than its factorization.

25605343317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117540.

The product of its (nonzero) digits is 226800, while the sum is 39.

Adding to 25605343317 its reverse (71334350652), we get a palindrome (96939693969).

The spelling of 25605343317 in words is "twenty-five billion, six hundred five million, three hundred forty-three thousand, three hundred seventeen".