25250280052805 has 16 divisors (see below), whose sum is σ = 30386204335344. Its totient is φ = 20142995051520.

The previous prime is 25250280052787. The next prime is 25250280052807. The reversal of 25250280052805 is 50825008205252.

It can be written as a sum of positive squares in 8 ways, for example, as 359450609764 + 24890829443041 = 599542^2 + 4989071^2 .

It is not a de Polignac number, because 25250280052805 - 2¹⁶ = 25250279987269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25250280052807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11236835 + ... + 13295375.

It is an arithmetic number, because the mean of its divisors is an integer number (1899137770959).

Almost surely, 2^{25250280052805} is an apocalyptic number.

It is an amenable number.

25250280052805 is a deficient number, since it is larger than the sum of its proper divisors (5135924282539).

25250280052805 is a wasteful number, since it uses less digits than its factorization.

25250280052805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065496.

The product of its (nonzero) digits is 640000, while the sum is 44.

The spelling of 25250280052805 in words is "twenty-five trillion, two hundred fifty billion, two hundred eighty million, fifty-two thousand, eight hundred five".