25850634653 has 2 divisors, whose sum is σ = 25850634654. Its totient is φ = 25850634652.

The previous prime is 25850634613. The next prime is 25850634679. The reversal of 25850634653 is 35643605852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24235639684 + 1614994969 = 155678^2 + 40187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25850634653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25850634598 and 25850634607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25850634613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12925317326 + 12925317327.

It is an arithmetic number, because the mean of its divisors is an integer number (12925317327).

Almost surely, 2^25850634653 is an apocalyptic number.

It is an amenable number.

25850634653 is a deficient number, since it is larger than the sum of its proper divisors (1).

25850634653 is an equidigital number, since it uses as much as digits as its factorization.

25850634653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 25850634653 in words is "twenty-five billion, eight hundred fifty million, six hundred thirty-four thousand, six hundred fifty-three".