8471488644 has 18 divisors (see below), whose sum is σ = 21414040830. Its totient is φ = 2823829536.

The previous prime is 8471488621. The next prime is 8471488651. The reversal of 8471488644 is 4468841748.

It can be written as a sum of positive squares in only one way, i.e., 8264991744 + 206496900 = 90912^2 + 14370^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×8471488644² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117659529 + ... + 117659600.

It is an arithmetic number, because the mean of its divisors is an integer number (1189668935).

Almost surely, 2^8471488644 is an apocalyptic number.

It is an amenable number.

8471488644 is an abundant number, since it is smaller than the sum of its proper divisors (12942552186).

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

8471488644 is a wasteful number, since it uses less digits than its factorization.

8471488644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235319139 (or 235319134 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 54.

The square root of 8471488644 is about 92040.6901538662. The cubic root of 8471488644 is about 2038.5431611343.

The spelling of 8471488644 in words is "eight billion, four hundred seventy-one million, four hundred eighty-eight thousand, six hundred forty-four".