25405240311349 has 2 divisors, whose sum is σ = 25405240311350. Its totient is φ = 25405240311348.

The previous prime is 25405240311247. The next prime is 25405240311359. The reversal of 25405240311349 is 94311304250452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22717139062500 + 2688101248849 = 4766250^2 + 1639543^2 .

It is a cyclic number.

It is not a de Polignac number, because 25405240311349 - 2⁷ = 25405240311221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25405240311359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12702620155674 + 12702620155675.

It is an arithmetic number, because the mean of its divisors is an integer number (12702620155675).

Almost surely, 2^{25405240311349} is an apocalyptic number.

It is an amenable number.

25405240311349 is a deficient number, since it is larger than the sum of its proper divisors (1).

25405240311349 is an equidigital number, since it uses as much as digits as its factorization.

25405240311349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 25405240311349 in words is "twenty-five trillion, four hundred five billion, two hundred forty million, three hundred eleven thousand, three hundred forty-nine".