25193533107817 has 2 divisors, whose sum is σ = 25193533107818. Its totient is φ = 25193533107816.

The previous prime is 25193533107803. The next prime is 25193533107857. The reversal of 25193533107817 is 71870133539152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24544137273616 + 649395834201 = 4954204^2 + 805851^2 .

It is a cyclic number.

It is not a de Polignac number, because 25193533107817 - 2⁷ = 25193533107689 is a prime.

It is a super-2 number, since 2×25193533107817² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25193533107857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12596766553908 + 12596766553909.

It is an arithmetic number, because the mean of its divisors is an integer number (12596766553909).

Almost surely, 2^{25193533107817} is an apocalyptic number.

It is an amenable number.

25193533107817 is a deficient number, since it is larger than the sum of its proper divisors (1).

25193533107817 is an equidigital number, since it uses as much as digits as its factorization.

25193533107817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 25193533107817 in words is "twenty-five trillion, one hundred ninety-three billion, five hundred thirty-three million, one hundred seven thousand, eight hundred seventeen".