85791019793 has 2 divisors, whose sum is σ = 85791019794. Its totient is φ = 85791019792.

The previous prime is 85791019757. The next prime is 85791019817. The reversal of 85791019793 is 39791019758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77301793024 + 8489226769 = 278032^2 + 92137^2 .

It is a cyclic number.

It is not a de Polignac number, because 85791019793 - 2¹⁴ = 85791003409 is a prime.

It is not a weakly prime, because it can be changed into another prime (85791019723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42895509896 + 42895509897.

It is an arithmetic number, because the mean of its divisors is an integer number (42895509897).

Almost surely, 2^85791019793 is an apocalyptic number.

It is an amenable number.

85791019793 is a deficient number, since it is larger than the sum of its proper divisors (1).

85791019793 is an equidigital number, since it uses as much as digits as its factorization.

85791019793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4286520, while the sum is 59.

The spelling of 85791019793 in words is "eighty-five billion, seven hundred ninety-one million, nineteen thousand, seven hundred ninety-three".