7884117089689 has 9 divisors (see below), whose sum is σ = 8165442223263. Its totient is φ = 7612172362872.

The previous prime is 7884117089677. The next prime is 7884117089707. The reversal of 7884117089689 is 9869807114887.

The square root of 7884117089689 is 2807867.

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

It can be written as a sum of positive squares in only one way, i.e., 4134239758089 + 3749877331600 = 2033283^2 + 1936460^2 .

It is not a de Polignac number, because 7884117089689 - 2¹¹ = 7884117087641 is a prime.

It is a super-2 number, since 2×7884117089689² (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 (7884117009689) 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, 81379732 + ... + 81476554.

Almost surely, 2^{7884117089689} is an apocalyptic number.

7884117089689 is the 2807867-th square number.

7884117089689 is the 1403934-th centered octagonal number.

It is an amenable number.

7884117089689 is a deficient number, since it is larger than the sum of its proper divisors (281325133574).

7884117089689 is an frugal number, since it uses more digits than its factorization.

7884117089689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193704 (or 96852 counting only the distinct ones).

The product of its (nonzero) digits is 390168576, while the sum is 76.

The spelling of 7884117089689 in words is "seven trillion, eight hundred eighty-four billion, one hundred seventeen million, eighty-nine thousand, six hundred eighty-nine".