85512091193 has 2 divisors, whose sum is σ = 85512091194. Its totient is φ = 85512091192.

The previous prime is 85512091177. The next prime is 85512091241. The reversal of 85512091193 is 39119021558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78555196729 + 6956894464 = 280277^2 + 83408^2 .

It is a cyclic number.

It is not a de Polignac number, because 85512091193 - 2⁴ = 85512091177 is a prime.

It is not a weakly prime, because it can be changed into another prime (85512091393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42756045596 + 42756045597.

It is an arithmetic number, because the mean of its divisors is an integer number (42756045597).

Almost surely, 2^85512091193 is an apocalyptic number.

It is an amenable number.

85512091193 is a deficient number, since it is larger than the sum of its proper divisors (1).

85512091193 is an equidigital number, since it uses as much as digits as its factorization.

85512091193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 85512091193 in words is "eighty-five billion, five hundred twelve million, ninety-one thousand, one hundred ninety-three".