78282116289 has 12 divisors (see below), whose sum is σ = 121772181076. Its totient is φ = 48173609952.

The previous prime is 78282116221. The next prime is 78282116293. The reversal of 78282116289 is 98261128287.

78282116289 is a `hidden beast` number, since 7 + 8 + 2 + 8 + 2 + 1 + 1 + 628 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28437088689 + 49845027600 = 168633^2 + 223260^2 .

It is not a de Polignac number, because 78282116289 - 2¹⁶ = 78282050753 is a prime.

It is a super-2 number, since 2×78282116289² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78282116299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334538842 + ... + 334539075.

Almost surely, 2^78282116289 is an apocalyptic number.

It is an amenable number.

78282116289 is a deficient number, since it is larger than the sum of its proper divisors (43490064787).

78282116289 is a wasteful number, since it uses less digits than its factorization.

78282116289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669077936 (or 669077933 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 78282116289 in words is "seventy-eight billion, two hundred eighty-two million, one hundred sixteen thousand, two hundred eighty-nine".