85600365821 has 2 divisors, whose sum is σ = 85600365822. Its totient is φ = 85600365820.

The previous prime is 85600365811. The next prime is 85600365827. The reversal of 85600365821 is 12856300658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52596376921 + 33003988900 = 229339^2 + 181670^2 .

It is a cyclic number.

It is not a de Polignac number, because 85600365821 - 2³⁰ = 84526623997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85600365827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42800182910 + 42800182911.

It is an arithmetic number, because the mean of its divisors is an integer number (42800182911).

Almost surely, 2^85600365821 is an apocalyptic number.

It is an amenable number.

85600365821 is a deficient number, since it is larger than the sum of its proper divisors (1).

85600365821 is an equidigital number, since it uses as much as digits as its factorization.

85600365821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The spelling of 85600365821 in words is "eighty-five billion, six hundred million, three hundred sixty-five thousand, eight hundred twenty-one".