25440335604191 has 2 divisors, whose sum is σ = 25440335604192. Its totient is φ = 25440335604190.

The previous prime is 25440335604059. The next prime is 25440335604217. The reversal of 25440335604191 is 19140653304452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25440335604191 - 2³⁴ = 25423155735007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25440335604991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720167802095 + 12720167802096.

It is an arithmetic number, because the mean of its divisors is an integer number (12720167802096).

Almost surely, 2^{25440335604191} is an apocalyptic number.

25440335604191 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440335604191 is an equidigital number, since it uses as much as digits as its factorization.

25440335604191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 25440335604191 in words is "twenty-five trillion, four hundred forty billion, three hundred thirty-five million, six hundred four thousand, one hundred ninety-one".