85120243253 has 2 divisors, whose sum is σ = 85120243254. Its totient is φ = 85120243252.

The previous prime is 85120243237. The next prime is 85120243301. The reversal of 85120243253 is 35234202158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85113394564 + 6848689 = 291742^2 + 2617^2 .

It is a cyclic number.

It is not a de Polignac number, because 85120243253 - 2⁴ = 85120243237 is a prime.

It is a super-2 number, since 2×85120243253² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85120243753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42560121626 + 42560121627.

It is an arithmetic number, because the mean of its divisors is an integer number (42560121627).

Almost surely, 2^85120243253 is an apocalyptic number.

It is an amenable number.

85120243253 is a deficient number, since it is larger than the sum of its proper divisors (1).

85120243253 is an equidigital number, since it uses as much as digits as its factorization.

85120243253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 85120243253 in words is "eighty-five billion, one hundred twenty million, two hundred forty-three thousand, two hundred fifty-three".