85686823278 has 24 divisors (see below), whose sum is σ = 212176896048. Its totient is φ = 24481949472.

The previous prime is 85686823267. The next prime is 85686823283. The reversal of 85686823278 is 87232868658.

85686823278 is a `hidden beast` number, since 8 + 568 + 68 + 2 + 3 + 2 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 340026951 + ... + 340027202.

It is an arithmetic number, because the mean of its divisors is an integer number (8840704002).

Almost surely, 2^85686823278 is an apocalyptic number.

85686823278 is an abundant number, since it is smaller than the sum of its proper divisors (126490072770).

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

85686823278 is a wasteful number, since it uses less digits than its factorization.

85686823278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680054168 (or 680054165 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 85686823278 in words is "eighty-five billion, six hundred eighty-six million, eight hundred twenty-three thousand, two hundred seventy-eight".