25488247075261 has 2 divisors, whose sum is σ = 25488247075262. Its totient is φ = 25488247075260.

The previous prime is 25488247075243. The next prime is 25488247075273. The reversal of 25488247075261 is 16257074288452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25247921622361 + 240325452900 = 5024731^2 + 490230^2 .

It is a cyclic number.

It is not a de Polignac number, because 25488247075261 - 2¹³ = 25488247067069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25488247075261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25488247075241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12744123537630 + 12744123537631.

It is an arithmetic number, because the mean of its divisors is an integer number (12744123537631).

Almost surely, 2^{25488247075261} is an apocalyptic number.

It is an amenable number.

25488247075261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25488247075261 is an equidigital number, since it uses as much as digits as its factorization.

25488247075261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60211200, while the sum is 61.

The spelling of 25488247075261 in words is "twenty-five trillion, four hundred eighty-eight billion, two hundred forty-seven million, seventy-five thousand, two hundred sixty-one".