85384211813 has 2 divisors, whose sum is σ = 85384211814. Its totient is φ = 85384211812.

The previous prime is 85384211707. The next prime is 85384211839. The reversal of 85384211813 is 31811248358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46912527649 + 38471684164 = 216593^2 + 196142^2 .

It is a cyclic number.

It is not a de Polignac number, because 85384211813 - 2²⁴ = 85367434597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85384217813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42692105906 + 42692105907.

It is an arithmetic number, because the mean of its divisors is an integer number (42692105907).

Almost surely, 2^85384211813 is an apocalyptic number.

It is an amenable number.

85384211813 is a deficient number, since it is larger than the sum of its proper divisors (1).

85384211813 is an equidigital number, since it uses as much as digits as its factorization.

85384211813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 44.

The spelling of 85384211813 in words is "eighty-five billion, three hundred eighty-four million, two hundred eleven thousand, eight hundred thirteen".