85807638856656 has 60 divisors (see below), whose sum is σ = 240146758003620. Its totient is φ = 28602004769280.

The previous prime is 85807638856613. The next prime is 85807638856733. The reversal of 85807638856656 is 65665883670858.

It can be written as a sum of positive squares in 2 ways, for example, as 51653198984256 + 34154439872400 = 7187016^2 + 5844180^2 .

It is a super-2 number, since 2×85807638856656² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2027676 + ... + 13256196.

It is an arithmetic number, because the mean of its divisors is an integer number (4002445966727).

Almost surely, 2^{85807638856656} is an apocalyptic number.

It is an amenable number.

85807638856656 is an abundant number, since it is smaller than the sum of its proper divisors (154339119146964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85807638856656 is a wasteful number, since it uses less digits than its factorization.

85807638856656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11281604 (or 11281595 counting only the distinct ones).

The product of its (nonzero) digits is 13934592000, while the sum is 81.

The spelling of 85807638856656 in words is "eighty-five trillion, eight hundred seven billion, six hundred thirty-eight million, eight hundred fifty-six thousand, six hundred fifty-six".