25171253322847 has 2 divisors, whose sum is σ = 25171253322848. Its totient is φ = 25171253322846.

The previous prime is 25171253322841. The next prime is 25171253322869. The reversal of 25171253322847 is 74822335217152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25171253322847 - 2²³ = 25171244934239 is a prime.

It is a super-2 number, since 2×25171253322847² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25171253322794 and 25171253322803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25171253322841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12585626661423 + 12585626661424.

It is an arithmetic number, because the mean of its divisors is an integer number (12585626661424).

Almost surely, 2^{25171253322847} is an apocalyptic number.

25171253322847 is a deficient number, since it is larger than the sum of its proper divisors (1).

25171253322847 is an equidigital number, since it uses as much as digits as its factorization.

25171253322847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5644800, while the sum is 52.

Adding to 25171253322847 its reverse (74822335217152), we get a palindrome (99993588539999).

The spelling of 25171253322847 in words is "twenty-five trillion, one hundred seventy-one billion, two hundred fifty-three million, three hundred twenty-two thousand, eight hundred forty-seven".