25052604212509 has 2 divisors, whose sum is σ = 25052604212510. Its totient is φ = 25052604212508.

The previous prime is 25052604212459. The next prime is 25052604212533. The reversal of 25052604212509 is 90521240625052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18122432132025 + 6930172080484 = 4257045^2 + 2632522^2 .

It is a cyclic number.

It is not a de Polignac number, because 25052604212509 - 2¹⁷ = 25052604081437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25052604212539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12526302106254 + 12526302106255.

It is an arithmetic number, because the mean of its divisors is an integer number (12526302106255).

Almost surely, 2^{25052604212509} is an apocalyptic number.

It is an amenable number.

25052604212509 is a deficient number, since it is larger than the sum of its proper divisors (1).

25052604212509 is an equidigital number, since it uses as much as digits as its factorization.

25052604212509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 25052604212509 in words is "twenty-five trillion, fifty-two billion, six hundred four million, two hundred twelve thousand, five hundred nine".