85476643828 has 12 divisors (see below), whose sum is σ = 149843375332. Its totient is φ = 42664250880.

The previous prime is 85476643823. The next prime is 85476643843. The reversal of 85476643828 is 82834667458.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 82827688804 + 2648955024 = 287798^2 + 51468^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85476643823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18515163 + ... + 18519778.

Almost surely, 2^85476643828 is an apocalyptic number.

It is an amenable number.

85476643828 is a deficient number, since it is larger than the sum of its proper divisors (64366731504).

85476643828 is a wasteful number, since it uses less digits than its factorization.

85476643828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37035522 (or 37035520 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 61.

The spelling of 85476643828 in words is "eighty-five billion, four hundred seventy-six million, six hundred forty-three thousand, eight hundred twenty-eight".