25604674717 has 2 divisors, whose sum is σ = 25604674718. Its totient is φ = 25604674716.

The previous prime is 25604674639. The next prime is 25604674723. The reversal of 25604674717 is 71747640652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24732594756 + 872079961 = 157266^2 + 29531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25604674717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25604674747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12802337358 + 12802337359.

It is an arithmetic number, because the mean of its divisors is an integer number (12802337359).

Almost surely, 2^25604674717 is an apocalyptic number.

It is an amenable number.

25604674717 is a deficient number, since it is larger than the sum of its proper divisors (1).

25604674717 is an equidigital number, since it uses as much as digits as its factorization.

25604674717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1975680, while the sum is 49.

The spelling of 25604674717 in words is "twenty-five billion, six hundred four million, six hundred seventy-four thousand, seven hundred seventeen".