25741056409 has 2 divisors, whose sum is σ = 25741056410. Its totient is φ = 25741056408.

The previous prime is 25741056389. The next prime is 25741056427. The reversal of 25741056409 is 90465014752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13375616409 + 12365440000 = 115653^2 + 111200^2 .

It is a cyclic number.

It is not a de Polignac number, because 25741056409 - 2¹⁷ = 25740925337 is a prime.

It is not a weakly prime, because it can be changed into another prime (25741056479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12870528204 + 12870528205.

It is an arithmetic number, because the mean of its divisors is an integer number (12870528205).

Almost surely, 2^25741056409 is an apocalyptic number.

It is an amenable number.

25741056409 is a deficient number, since it is larger than the sum of its proper divisors (1).

25741056409 is an equidigital number, since it uses as much as digits as its factorization.

25741056409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 25741056409 in words is "twenty-five billion, seven hundred forty-one million, fifty-six thousand, four hundred nine".