25782205297 has 2 divisors, whose sum is σ = 25782205298. Its totient is φ = 25782205296.

The previous prime is 25782205289. The next prime is 25782205301. The reversal of 25782205297 is 79250228752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25166966881 + 615238416 = 158641^2 + 24804^2 .

It is a cyclic number.

It is not a de Polignac number, because 25782205297 - 2³ = 25782205289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25782205297.

It is not a weakly prime, because it can be changed into another prime (25782205277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12891102648 + 12891102649.

It is an arithmetic number, because the mean of its divisors is an integer number (12891102649).

Almost surely, 2^25782205297 is an apocalyptic number.

It is an amenable number.

25782205297 is a deficient number, since it is larger than the sum of its proper divisors (1).

25782205297 is an equidigital number, since it uses as much as digits as its factorization.

25782205297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 25782205297 in words is "twenty-five billion, seven hundred eighty-two million, two hundred five thousand, two hundred ninety-seven".