25284816149 has 2 divisors, whose sum is σ = 25284816150. Its totient is φ = 25284816148.

The previous prime is 25284816127. The next prime is 25284816173. The reversal of 25284816149 is 94161848252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21348132100 + 3936684049 = 146110^2 + 62743^2 .

It is a cyclic number.

It is not a de Polignac number, because 25284816149 - 2¹⁶ = 25284750613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25284816097 and 25284816106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25284816199) 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, 12642408074 + 12642408075.

It is an arithmetic number, because the mean of its divisors is an integer number (12642408075).

Almost surely, 2^25284816149 is an apocalyptic number.

It is an amenable number.

25284816149 is a deficient number, since it is larger than the sum of its proper divisors (1).

25284816149 is an equidigital number, since it uses as much as digits as its factorization.

25284816149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 50.

The spelling of 25284816149 in words is "twenty-five billion, two hundred eighty-four million, eight hundred sixteen thousand, one hundred forty-nine".