25205663012077 has 2 divisors, whose sum is σ = 25205663012078. Its totient is φ = 25205663012076.

The previous prime is 25205663012063. The next prime is 25205663012081. The reversal of 25205663012077 is 77021036650252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20019995845641 + 5185667166436 = 4474371^2 + 2277206^2 .

It is a cyclic number.

It is not a de Polignac number, because 25205663012077 - 2²⁷ = 25205528794349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25205663012017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12602831506038 + 12602831506039.

It is an arithmetic number, because the mean of its divisors is an integer number (12602831506039).

Almost surely, 2^{25205663012077} is an apocalyptic number.

It is an amenable number.

25205663012077 is a deficient number, since it is larger than the sum of its proper divisors (1).

25205663012077 is an equidigital number, since it uses as much as digits as its factorization.

25205663012077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 25205663012077 in words is "twenty-five trillion, two hundred five billion, six hundred sixty-three million, twelve thousand, seventy-seven".