25382859265721 has 2 divisors, whose sum is σ = 25382859265722. Its totient is φ = 25382859265720.

The previous prime is 25382859265711. The next prime is 25382859265811. The reversal of 25382859265721 is 12756295828352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21842873460496 + 3539985805225 = 4673636^2 + 1881485^2 .

It is a cyclic number.

It is not a de Polignac number, because 25382859265721 - 2⁶ = 25382859265657 is a prime.

It is not a weakly prime, because it can be changed into another prime (25382859265711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12691429632860 + 12691429632861.

It is an arithmetic number, because the mean of its divisors is an integer number (12691429632861).

Almost surely, 2^{25382859265721} is an apocalyptic number.

It is an amenable number.

25382859265721 is a deficient number, since it is larger than the sum of its proper divisors (1).

25382859265721 is an equidigital number, since it uses as much as digits as its factorization.

25382859265721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152000, while the sum is 65.

The spelling of 25382859265721 in words is "twenty-five trillion, three hundred eighty-two billion, eight hundred fifty-nine million, two hundred sixty-five thousand, seven hundred twenty-one".