85380441709 has 2 divisors, whose sum is σ = 85380441710. Its totient is φ = 85380441708.

The previous prime is 85380441689. The next prime is 85380441857. The reversal of 85380441709 is 90714408358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54070200900 + 31310240809 = 232530^2 + 176947^2 .

It is a cyclic number.

It is not a de Polignac number, because 85380441709 - 2⁹ = 85380441197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85380441109) 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, 42690220854 + 42690220855.

It is an arithmetic number, because the mean of its divisors is an integer number (42690220855).

Almost surely, 2^85380441709 is an apocalyptic number.

It is an amenable number.

85380441709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85380441709 is an equidigital number, since it uses as much as digits as its factorization.

85380441709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 85380441709 in words is "eighty-five billion, three hundred eighty million, four hundred forty-one thousand, seven hundred nine".