8280778005 has 12 divisors (see below), whose sum is σ = 14353348620. Its totient is φ = 4416414912.

The previous prime is 8280778003. The next prime is 8280778027. The reversal of 8280778005 is 5008770828.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 885122001 + 7395656004 = 29751^2 + 85998^2 .

It is not a de Polignac number, because 8280778005 - 2¹ = 8280778003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 184017289 = 8280778005 / (8 + 2 + 8 + 0 + 7 + 7 + 8 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8280778003) 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 11 ways as a sum of consecutive naturals, for example, 92008600 + ... + 92008689.

It is an arithmetic number, because the mean of its divisors is an integer number (1196112385).

Almost surely, 2^8280778005 is an apocalyptic number.

It is an amenable number.

8280778005 is a deficient number, since it is larger than the sum of its proper divisors (6072570615).

8280778005 is a wasteful number, since it uses less digits than its factorization.

8280778005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184017300 (or 184017297 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 8280778005 is about 90998.7802390779. The cubic root of 8280778005 is about 2023.1296456698.

The spelling of 8280778005 in words is "eight billion, two hundred eighty million, seven hundred seventy-eight thousand, five".