85531717807 has 2 divisors, whose sum is σ = 85531717808. Its totient is φ = 85531717806.

The previous prime is 85531717771. The next prime is 85531717853. The reversal of 85531717807 is 70871713558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85531717807 - 2⁷ = 85531717679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85531717307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42765858903 + 42765858904.

It is an arithmetic number, because the mean of its divisors is an integer number (42765858904).

Almost surely, 2^85531717807 is an apocalyptic number.

85531717807 is a deficient number, since it is larger than the sum of its proper divisors (1).

85531717807 is an equidigital number, since it uses as much as digits as its factorization.

85531717807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1646400, while the sum is 52.

The spelling of 85531717807 in words is "eighty-five billion, five hundred thirty-one million, seven hundred seventeen thousand, eight hundred seven".