85174268427509 has 2 divisors, whose sum is σ = 85174268427510. Its totient is φ = 85174268427508.

The previous prime is 85174268427397. The next prime is 85174268427653. The reversal of 85174268427509 is 90572486247158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72967301568100 + 12206966859409 = 8542090^2 + 3493847^2 .

It is a cyclic number.

It is not a de Polignac number, because 85174268427509 - 2⁸ = 85174268427253 is a prime.

It is a super-2 number, since 2×85174268427509² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85174268426509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42587134213754 + 42587134213755.

It is an arithmetic number, because the mean of its divisors is an integer number (42587134213755).

Almost surely, 2^{85174268427509} is an apocalyptic number.

It is an amenable number.

85174268427509 is a deficient number, since it is larger than the sum of its proper divisors (1).

85174268427509 is an equidigital number, since it uses as much as digits as its factorization.

85174268427509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270950400, while the sum is 68.

The spelling of 85174268427509 in words is "eighty-five trillion, one hundred seventy-four billion, two hundred sixty-eight million, four hundred twenty-seven thousand, five hundred nine".