25405240311247 has 2 divisors, whose sum is σ = 25405240311248. Its totient is φ = 25405240311246.

The previous prime is 25405240311221. The next prime is 25405240311349. The reversal of 25405240311247 is 74211304250452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25405240311247 - 2¹¹ = 25405240309199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25405240318247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12702620155623 + 12702620155624.

It is an arithmetic number, because the mean of its divisors is an integer number (12702620155624).

Almost surely, 2^{25405240311247} is an apocalyptic number.

25405240311247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25405240311247 is an equidigital number, since it uses as much as digits as its factorization.

25405240311247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 268800, while the sum is 40.

Adding to 25405240311247 its reverse (74211304250452), we get a palindrome (99616544561699).

The spelling of 25405240311247 in words is "twenty-five trillion, four hundred five billion, two hundred forty million, three hundred eleven thousand, two hundred forty-seven".