8116388281 has 9 divisors (see below), whose sum is σ = 8486784271. Its totient is φ = 7761519832.

The previous prime is 8116388279. The next prime is 8116388297. The reversal of 8116388281 is 1828836118.

The square root of 8116388281 is 90091.

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., 6573155625 + 1543232656 = 81075^2 + 39284^2 .

It is not a de Polignac number, because 8116388281 - 2¹ = 8116388279 is a prime.

It is a super-2 number, since 2×8116388281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8116388201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2070135 + ... + 2074051.

Almost surely, 2^8116388281 is an apocalyptic number.

8116388281 is the 90091-st square number.

8116388281 is the 45046-th centered octagonal number.

It is an amenable number.

8116388281 is a deficient number, since it is larger than the sum of its proper divisors (370395990).

8116388281 is an frugal number, since it uses more digits than its factorization.

8116388281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7880 (or 3940 counting only the distinct ones).

The product of its digits is 147456, while the sum is 46.

The cubic root of 8116388281 is about 2009.6523644063.

The spelling of 8116388281 in words is "eight billion, one hundred sixteen million, three hundred eighty-eight thousand, two hundred eighty-one".