85428564317 has 2 divisors, whose sum is σ = 85428564318. Its totient is φ = 85428564316.

The previous prime is 85428564293. The next prime is 85428564323. The reversal of 85428564317 is 71346582458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54111599161 + 31316965156 = 232619^2 + 176966^2 .

It is a cyclic number.

It is not a de Polignac number, because 85428564317 - 2¹⁴ = 85428547933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85428564337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42714282158 + 42714282159.

It is an arithmetic number, because the mean of its divisors is an integer number (42714282159).

Almost surely, 2^85428564317 is an apocalyptic number.

It is an amenable number.

85428564317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85428564317 is an equidigital number, since it uses as much as digits as its factorization.

85428564317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6451200, while the sum is 53.

The spelling of 85428564317 in words is "eighty-five billion, four hundred twenty-eight million, five hundred sixty-four thousand, three hundred seventeen".