8438647354225 has 27 divisors (see below), whose sum is σ = 11501884889761. Its totient is φ = 6137081878400.

The previous prime is 8438647354187. The next prime is 8438647354279. The reversal of 8438647354225 is 5224537468348.

The square root of 8438647354225 is 2904935.

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

It can be written as a sum of positive squares in 4 ways, for example, as 5250408556129 + 3188238798096 = 2291377^2 + 1785564^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8438647354225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 159745017 + ... + 159797833.

Almost surely, 2^{8438647354225} is an apocalyptic number.

8438647354225 is the 2904935-th square number.

8438647354225 is the 1452468-th centered octagonal number.

It is an amenable number.

8438647354225 is a deficient number, since it is larger than the sum of its proper divisors (3063237535536).

8438647354225 is an frugal number, since it uses more digits than its factorization.

8438647354225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105666 (or 52833 counting only the distinct ones).

The product of its digits is 154828800, while the sum is 61.

The spelling of 8438647354225 in words is "eight trillion, four hundred thirty-eight billion, six hundred forty-seven million, three hundred fifty-four thousand, two hundred twenty-five".