825118825309 has 2 divisors, whose sum is σ = 825118825310. Its totient is φ = 825118825308.

The previous prime is 825118825187. The next prime is 825118825339. The reversal of 825118825309 is 903528811528.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704516816025 + 120602009284 = 839355^2 + 347278^2 .

It is a cyclic number.

It is not a de Polignac number, because 825118825309 - 2¹¹ = 825118823261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825118825339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412559412654 + 412559412655.

It is an arithmetic number, because the mean of its divisors is an integer number (412559412655).

Almost surely, 2^825118825309 is an apocalyptic number.

It is an amenable number.

825118825309 is a deficient number, since it is larger than the sum of its proper divisors (1).

825118825309 is an equidigital number, since it uses as much as digits as its factorization.

825118825309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382400, while the sum is 52.

The spelling of 825118825309 in words is "eight hundred twenty-five billion, one hundred eighteen million, eight hundred twenty-five thousand, three hundred nine".