25063668397 has 2 divisors, whose sum is σ = 25063668398. Its totient is φ = 25063668396.

The previous prime is 25063668373. The next prime is 25063668407. The reversal of 25063668397 is 79386636052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17166502441 + 7897165956 = 131021^2 + 88866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25063668397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25063668697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12531834198 + 12531834199.

It is an arithmetic number, because the mean of its divisors is an integer number (12531834199).

Almost surely, 2^25063668397 is an apocalyptic number.

It is an amenable number.

25063668397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25063668397 is an equidigital number, since it uses as much as digits as its factorization.

25063668397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 25063668397 in words is "twenty-five billion, sixty-three million, six hundred sixty-eight thousand, three hundred ninety-seven".