85759842152921 has 2 divisors, whose sum is σ = 85759842152922. Its totient is φ = 85759842152920.

The previous prime is 85759842152857. The next prime is 85759842152923. The reversal of 85759842152921 is 12925124895758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76253325259225 + 9506516893696 = 8732315^2 + 3083264^2 .

It is a cyclic number.

It is not a de Polignac number, because 85759842152921 - 2⁶ = 85759842152857 is a prime.

Together with 85759842152923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85759842152923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42879921076460 + 42879921076461.

It is an arithmetic number, because the mean of its divisors is an integer number (42879921076461).

Almost surely, 2^{85759842152921} is an apocalyptic number.

It is an amenable number.

85759842152921 is a deficient number, since it is larger than the sum of its proper divisors (1).

85759842152921 is an equidigital number, since it uses as much as digits as its factorization.

85759842152921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152000, while the sum is 68.

The spelling of 85759842152921 in words is "eighty-five trillion, seven hundred fifty-nine billion, eight hundred forty-two million, one hundred fifty-two thousand, nine hundred twenty-one".