85372395678709 has 2 divisors, whose sum is σ = 85372395678710. Its totient is φ = 85372395678708.

The previous prime is 85372395678707. The next prime is 85372395678749. The reversal of 85372395678709 is 90787659327358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54456238025809 + 30916157652900 = 7379447^2 + 5560230^2 .

It is a cyclic number.

It is not a de Polignac number, because 85372395678709 - 2¹ = 85372395678707 is a prime.

It is a super-2 number, since 2×85372395678709² (a number of 29 digits) contains 22 as substring.

Together with 85372395678707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85372395678707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42686197839354 + 42686197839355.

It is an arithmetic number, because the mean of its divisors is an integer number (42686197839355).

Almost surely, 2^{85372395678709} is an apocalyptic number.

It is an amenable number.

85372395678709 is a deficient number, since it is larger than the sum of its proper divisors (1).

85372395678709 is an equidigital number, since it uses as much as digits as its factorization.

85372395678709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800902400, while the sum is 79.

The spelling of 85372395678709 in words is "eighty-five trillion, three hundred seventy-two billion, three hundred ninety-five million, six hundred seventy-eight thousand, seven hundred nine".