85685573543 has 2 divisors, whose sum is σ = 85685573544. Its totient is φ = 85685573542.

The previous prime is 85685573539. The next prime is 85685573573. The reversal of 85685573543 is 34537558658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85685573543 - 2² = 85685573539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85685573573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42842786771 + 42842786772.

It is an arithmetic number, because the mean of its divisors is an integer number (42842786772).

Almost surely, 2^85685573543 is an apocalyptic number.

85685573543 is a deficient number, since it is larger than the sum of its proper divisors (1).

85685573543 is an equidigital number, since it uses as much as digits as its factorization.

85685573543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480000, while the sum is 59.

The spelling of 85685573543 in words is "eighty-five billion, six hundred eighty-five million, five hundred seventy-three thousand, five hundred forty-three".