85866607682393 has 2 divisors, whose sum is σ = 85866607682394. Its totient is φ = 85866607682392.

The previous prime is 85866607682389. The next prime is 85866607682467. The reversal of 85866607682393 is 39328670666858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70347002585344 + 15519605097049 = 8387312^2 + 3939493^2 .

It is a cyclic number.

It is not a de Polignac number, because 85866607682393 - 2² = 85866607682389 is a prime.

It is not a weakly prime, because it can be changed into another prime (85866607682893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42933303841196 + 42933303841197.

It is an arithmetic number, because the mean of its divisors is an integer number (42933303841197).

Almost surely, 2^{85866607682393} is an apocalyptic number.

It is an amenable number.

85866607682393 is a deficient number, since it is larger than the sum of its proper divisors (1).

85866607682393 is an equidigital number, since it uses as much as digits as its factorization.

85866607682393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3762339840, while the sum is 77.

The spelling of 85866607682393 in words is "eighty-five trillion, eight hundred sixty-six billion, six hundred seven million, six hundred eighty-two thousand, three hundred ninety-three".