25941202549 has 2 divisors, whose sum is σ = 25941202550. Its totient is φ = 25941202548.

The previous prime is 25941202543. The next prime is 25941202591. The reversal of 25941202549 is 94520214952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24330384324 + 1610818225 = 155982^2 + 40135^2 .

It is a cyclic number.

It is not a de Polignac number, because 25941202549 - 2¹¹ = 25941200501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25941202543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12970601274 + 12970601275.

It is an arithmetic number, because the mean of its divisors is an integer number (12970601275).

Almost surely, 2^25941202549 is an apocalyptic number.

It is an amenable number.

25941202549 is a deficient number, since it is larger than the sum of its proper divisors (1).

25941202549 is an equidigital number, since it uses as much as digits as its factorization.

25941202549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 25941202549 in words is "twenty-five billion, nine hundred forty-one million, two hundred two thousand, five hundred forty-nine".