85229166978 has 30 divisors (see below), whose sum is σ = 190984793241. Its totient is φ = 28408483728.

The previous prime is 85229166947. The next prime is 85229166983. The reversal of 85229166978 is 87966192258.

85229166978 is a `hidden beast` number, since 8 + 522 + 9 + 16 + 6 + 97 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 79339678929 + 5889488049 = 281673^2 + 76743^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=206433.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3704326 + ... + 3727262.

Almost surely, 2^85229166978 is an apocalyptic number.

85229166978 is an abundant number, since it is smaller than the sum of its proper divisors (105755626263).

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

85229166978 is an frugal number, since it uses more digits than its factorization.

85229166978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45888 (or 22942 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 85229166978 in words is "eighty-five billion, two hundred twenty-nine million, one hundred sixty-six thousand, nine hundred seventy-eight".