8687544849 has 9 divisors (see below), whose sum is σ = 12549079803. Its totient is φ = 5791510152.

The previous prime is 8687544841. The next prime is 8687544851. The reversal of 8687544849 is 9484457868.

The square root of 8687544849 is 93207.

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

8687544849 is a `hidden beast` number, since 8 + 6 + 8 + 7 + 544 + 84 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4920040449 + 3767504400 = 70143^2 + 61380^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 8687544849 - 2³ = 8687544841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8687544841) 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 8 ways as a sum of consecutive naturals, for example, 264087 + ... + 295155.

Almost surely, 2^8687544849 is an apocalyptic number.

8687544849 is the 93207-th square number.

8687544849 is the 46604-th centered octagonal number.

It is an amenable number.

8687544849 is a deficient number, since it is larger than the sum of its proper divisors (3861534954).

8687544849 is an frugal number, since it uses more digits than its factorization.

8687544849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62144 (or 31072 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The cubic root of 8687544849 is about 2055.7281671915.

It can be divided in two parts, 8687 and 544849, that added together give a square (553536 = 744²).

The spelling of 8687544849 in words is "eight billion, six hundred eighty-seven million, five hundred forty-four thousand, eight hundred forty-nine".