85609785656 has 16 divisors (see below), whose sum is σ = 162321926400. Its totient is φ = 42323938624.

The previous prime is 85609785641. The next prime is 85609785691. The reversal of 85609785656 is 65658790658.

It is a junction number, because it is equal to n+sod(n) for n = 85609785592 and 85609785601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60118520 + ... + 60119943.

It is an arithmetic number, because the mean of its divisors is an integer number (10145120400).

Almost surely, 2^85609785656 is an apocalyptic number.

It is an amenable number.

85609785656 is a deficient number, since it is larger than the sum of its proper divisors (76712140744).

85609785656 is a wasteful number, since it uses less digits than its factorization.

85609785656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120238558 (or 120238554 counting only the distinct ones).

The product of its (nonzero) digits is 108864000, while the sum is 65.

The spelling of 85609785656 in words is "eighty-five billion, six hundred nine million, seven hundred eighty-five thousand, six hundred fifty-six".