85684266856 has 8 divisors (see below), whose sum is σ = 160658000370. Its totient is φ = 42842133424.

The previous prime is 85684266853. The next prime is 85684266911. The reversal of 85684266856 is 65866248658.

It can be written as a sum of positive squares in only one way, i.e., 46325674756 + 39358592100 = 215234^2 + 198390^2 .

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

It is not an unprimeable number, because it can be changed into a prime (85684266851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5355266671 + ... + 5355266686.

Almost surely, 2^85684266856 is an apocalyptic number.

It is an amenable number.

85684266856 is a deficient number, since it is larger than the sum of its proper divisors (74973733514).

85684266856 is a wasteful number, since it uses less digits than its factorization.

85684266856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10710533363 (or 10710533359 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 64.

The spelling of 85684266856 in words is "eighty-five billion, six hundred eighty-four million, two hundred sixty-six thousand, eight hundred fifty-six".