25195273289 has 2 divisors, whose sum is σ = 25195273290. Its totient is φ = 25195273288.

The previous prime is 25195273261. The next prime is 25195273303. The reversal of 25195273289 is 98237259152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20534890000 + 4660383289 = 143300^2 + 68267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25195273289 is a prime.

It is a super-2 number, since 2×25195273289² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25195273289.

It is not a weakly prime, because it can be changed into another prime (25195293289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12597636644 + 12597636645.

It is an arithmetic number, because the mean of its divisors is an integer number (12597636645).

Almost surely, 2^25195273289 is an apocalyptic number.

It is an amenable number.

25195273289 is a deficient number, since it is larger than the sum of its proper divisors (1).

25195273289 is an equidigital number, since it uses as much as digits as its factorization.

25195273289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 53.

The spelling of 25195273289 in words is "twenty-five billion, one hundred ninety-five million, two hundred seventy-three thousand, two hundred eighty-nine".