85443966864 has 45 divisors (see below), whose sum is σ = 239134252123. Its totient is φ = 28480153056.

The previous prime is 85443966851. The next prime is 85443966869. The reversal of 85443966864 is 46866934458.

The square root of 85443966864 is 292308.

It is a perfect power (a square), and thus also a powerful number.

85443966864 is a `hidden beast` number, since 8 + 544 + 3 + 9 + 6 + 6 + 86 + 4 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85443966869) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3495517 + ... + 3519875.

Almost surely, 2^85443966864 is an apocalyptic number.

85443966864 is the 292308-th square number.

It is an amenable number.

85443966864 is an abundant number, since it is smaller than the sum of its proper divisors (153690285259).

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

85443966864 is an frugal number, since it uses more digits than its factorization.

85443966864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48732 (or 24364 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 63.

The spelling of 85443966864 in words is "eighty-five billion, four hundred forty-three million, nine hundred sixty-six thousand, eight hundred sixty-four".