85686321786 has 16 divisors (see below), whose sum is σ = 184555154784. Its totient is φ = 26365022064.

The previous prime is 85686321781. The next prime is 85686321821. The reversal of 85686321786 is 68712368658.

It is not an unprimeable number, because it can be changed into a prime (85686321781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549271216 + ... + 549271371.

It is an arithmetic number, because the mean of its divisors is an integer number (11534697174).

Almost surely, 2^85686321786 is an apocalyptic number.

85686321786 is an abundant number, since it is smaller than the sum of its proper divisors (98868832998).

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

85686321786 is a wasteful number, since it uses less digits than its factorization.

85686321786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098542605.

The product of its digits is 23224320, while the sum is 60.

The spelling of 85686321786 in words is "eighty-five billion, six hundred eighty-six million, three hundred twenty-one thousand, seven hundred eighty-six".