25740001849 has 2 divisors, whose sum is σ = 25740001850. Its totient is φ = 25740001848.

The previous prime is 25740001789. The next prime is 25740001853. The reversal of 25740001849 is 94810004752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25586241849 + 153760000 = 159957^2 + 12400^2 .

It is a cyclic number.

It is not a de Polignac number, because 25740001849 - 2²³ = 25731613241 is a prime.

It is not a weakly prime, because it can be changed into another prime (25740001349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12870000924 + 12870000925.

It is an arithmetic number, because the mean of its divisors is an integer number (12870000925).

Almost surely, 2^25740001849 is an apocalyptic number.

It is an amenable number.

25740001849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25740001849 is an equidigital number, since it uses as much as digits as its factorization.

25740001849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 25740001849 in words is "twenty-five billion, seven hundred forty million, one thousand, eight hundred forty-nine".