25660047745529 has 2 divisors, whose sum is σ = 25660047745530. Its totient is φ = 25660047745528.

The previous prime is 25660047745511. The next prime is 25660047745571. The reversal of 25660047745529 is 92554774006652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19875190585600 + 5784857159929 = 4458160^2 + 2405173^2 .

It is a cyclic number.

It is not a de Polignac number, because 25660047745529 - 2¹⁶ = 25660047679993 is a prime.

It is not a weakly prime, because it can be changed into another prime (25660047745589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12830023872764 + 12830023872765.

It is an arithmetic number, because the mean of its divisors is an integer number (12830023872765).

Almost surely, 2^{25660047745529} is an apocalyptic number.

It is an amenable number.

25660047745529 is a deficient number, since it is larger than the sum of its proper divisors (1).

25660047745529 is an equidigital number, since it uses as much as digits as its factorization.

25660047745529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008000, while the sum is 62.

The spelling of 25660047745529 in words is "twenty-five trillion, six hundred sixty billion, forty-seven million, seven hundred forty-five thousand, five hundred twenty-nine".