85759842156889 has 2 divisors, whose sum is σ = 85759842156890. Its totient is φ = 85759842156888.

The previous prime is 85759842156817. The next prime is 85759842156953. The reversal of 85759842156889 is 98865124895758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81308092410000 + 4451749746889 = 9017100^2 + 2109917^2 .

It is a cyclic number.

It is not a de Polignac number, because 85759842156889 - 2⁷ = 85759842156761 is a prime.

It is not a weakly prime, because it can be changed into another prime (85759542156889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42879921078444 + 42879921078445.

It is an arithmetic number, because the mean of its divisors is an integer number (42879921078445).

Almost surely, 2^{85759842156889} is an apocalyptic number.

It is an amenable number.

85759842156889 is a deficient number, since it is larger than the sum of its proper divisors (1).

85759842156889 is an equidigital number, since it uses as much as digits as its factorization.

85759842156889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13934592000, while the sum is 85.

The spelling of 85759842156889 in words is "eighty-five trillion, seven hundred fifty-nine billion, eight hundred forty-two million, one hundred fifty-six thousand, eight hundred eighty-nine".