8687361289489 has 9 divisors (see below), whose sum is σ = 8720572259217. Its totient is φ = 8654276354064.

The previous prime is 8687361289379. The next prime is 8687361289549. The reversal of 8687361289489 is 9849821637868.

The square root of 8687361289489 is 2947433.

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 1331289054225 + 7356072235264 = 1153815^2 + 2712208^2 .

It is not a de Polignac number, because 8687361289489 - 2¹⁷ = 8687361158417 is a prime.

It is a super-2 number, since 2×8687361289489² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8687361289589) 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, 792853999 + ... + 792864955.

Almost surely, 2^{8687361289489} is an apocalyptic number.

8687361289489 is the 2947433-rd square number.

8687361289489 is the 1473717-th centered octagonal number.

It is an amenable number.

8687361289489 is a deficient number, since it is larger than the sum of its proper divisors (33210969728).

8687361289489 is an frugal number, since it uses more digits than its factorization.

8687361289489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22452 (or 11226 counting only the distinct ones).

The product of its digits is 2006581248, while the sum is 79.

The spelling of 8687361289489 in words is "eight trillion, six hundred eighty-seven billion, three hundred sixty-one million, two hundred eighty-nine thousand, four hundred eighty-nine".