117817816516 has 27 divisors (see below), whose sum is σ = 209133224013. Its totient is φ = 58077223200.

The previous prime is 117817816511. The next prime is 117817816531. The reversal of 117817816516 is 615618718711.

The square root of 117817816516 is 343246.

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

117817816516 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 66879132100 + 50938684416 = 258610^2 + 225696^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117817816511) 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, 50112741 + ... + 50115091.

Almost surely, 2^117817816516 is an apocalyptic number.

117817816516 is the 343246-th square number.

It is an amenable number.

117817816516 is a deficient number, since it is larger than the sum of its proper divisors (91315407497).

117817816516 is an frugal number, since it uses more digits than its factorization.

117817816516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852 (or 2426 counting only the distinct ones).

The product of its digits is 564480, while the sum is 52.

The spelling of 117817816516 in words is "one hundred seventeen billion, eight hundred seventeen million, eight hundred sixteen thousand, five hundred sixteen".