85108611857 has 2 divisors, whose sum is σ = 85108611858. Its totient is φ = 85108611856.

The previous prime is 85108611829. The next prime is 85108611871. The reversal of 85108611857 is 75811680158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68967163456 + 16141448401 = 262616^2 + 127049^2 .

It is a cyclic number.

It is not a de Polignac number, because 85108611857 - 2¹⁶ = 85108546321 is a prime.

It is not a weakly prime, because it can be changed into another prime (85108611157) 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, 42554305928 + 42554305929.

It is an arithmetic number, because the mean of its divisors is an integer number (42554305929).

Almost surely, 2^85108611857 is an apocalyptic number.

It is an amenable number.

85108611857 is a deficient number, since it is larger than the sum of its proper divisors (1).

85108611857 is an equidigital number, since it uses as much as digits as its factorization.

85108611857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 50.

The spelling of 85108611857 in words is "eighty-five billion, one hundred eight million, six hundred eleven thousand, eight hundred fifty-seven".