5447128864 has 24 divisors (see below), whose sum is σ = 10731038220. Its totient is φ = 2721785856.

The previous prime is 5447128861. The next prime is 5447128889. The reversal of 5447128864 is 4688217445.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5443488400 + 3640464 = 73780^2 + 1908^2 .

It is a super-2 number, since 2×5447128864² = 59342425722043860992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (5447128861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5109 + ... + 104500.

Almost surely, 2^5447128864 is an apocalyptic number.

It is an amenable number.

5447128864 is a deficient number, since it is larger than the sum of its proper divisors (5283909356).

5447128864 is a wasteful number, since it uses less digits than its factorization.

5447128864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111172 (or 111164 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 49.

The square root of 5447128864 is about 73804.6669527070. Note that the first 3 decimals coincide. The cubic root of 5447128864 is about 1759.4997786411.

The spelling of 5447128864 in words is "five billion, four hundred forty-seven million, one hundred twenty-eight thousand, eight hundred sixty-four".