85440866805 has 96 divisors (see below), whose sum is σ = 171614177280. Its totient is φ = 38517897600.

The previous prime is 85440866779. The next prime is 85440866827. The reversal of 85440866805 is 50866804458.

It is not a de Polignac number, because 85440866805 - 2⁷ = 85440866677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6605074 + ... + 6617996.

It is an arithmetic number, because the mean of its divisors is an integer number (1787647680).

Almost surely, 2^85440866805 is an apocalyptic number.

It is an amenable number.

85440866805 is an abundant number, since it is smaller than the sum of its proper divisors (86173310475).

85440866805 is a wasteful number, since it uses less digits than its factorization.

85440866805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13231 (or 13228 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 54.

The spelling of 85440866805 in words is "eighty-five billion, four hundred forty million, eight hundred sixty-six thousand, eight hundred five".