25699906653049 has 2 divisors, whose sum is σ = 25699906653050. Its totient is φ = 25699906653048.

The previous prime is 25699906653013. The next prime is 25699906653061. The reversal of 25699906653049 is 94035660999652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24760257537024 + 939649116025 = 4975968^2 + 969355^2 .

It is a cyclic number.

It is not a de Polignac number, because 25699906653049 - 2¹⁷ = 25699906521977 is a prime.

It is not a weakly prime, because it can be changed into another prime (25699906653089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12849953326524 + 12849953326525.

It is an arithmetic number, because the mean of its divisors is an integer number (12849953326525).

Almost surely, 2^{25699906653049} is an apocalyptic number.

It is an amenable number.

25699906653049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25699906653049 is an equidigital number, since it uses as much as digits as its factorization.

25699906653049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 850305600, while the sum is 73.

The spelling of 25699906653049 in words is "twenty-five trillion, six hundred ninety-nine billion, nine hundred six million, six hundred fifty-three thousand, forty-nine".