85648636856 has 8 divisors (see below), whose sum is σ = 160591194120. Its totient is φ = 42824318424.

The previous prime is 85648636847. The next prime is 85648636861. The reversal of 85648636856 is 65863684658.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 85648636792 and 85648636801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5353039796 + ... + 5353039811.

It is an arithmetic number, because the mean of its divisors is an integer number (20073899265).

Almost surely, 2^85648636856 is an apocalyptic number.

It is an amenable number.

85648636856 is a deficient number, since it is larger than the sum of its proper divisors (74942557264).

85648636856 is a wasteful number, since it uses less digits than its factorization.

85648636856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10706079613 (or 10706079609 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 65.

The spelling of 85648636856 in words is "eighty-five billion, six hundred forty-eight million, six hundred thirty-six thousand, eight hundred fifty-six".