82228377809 has 4 divisors (see below), whose sum is σ = 82232900004. Its totient is φ = 82223855616.

The previous prime is 82228377733. The next prime is 82228377811. The reversal of 82228377809 is 90877382228.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38140137025 + 44088240784 = 195295^2 + 209972^2 .

It is a cyclic number.

It is not a de Polignac number, because 82228377809 - 2¹² = 82228373713 is a prime.

It is a super-2 number, since 2×82228377809² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82228379809) 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 3 ways as a sum of consecutive naturals, for example, 2233712 + ... + 2270225.

It is an arithmetic number, because the mean of its divisors is an integer number (20558225001).

Almost surely, 2^82228377809 is an apocalyptic number.

It is an amenable number.

82228377809 is a deficient number, since it is larger than the sum of its proper divisors (4522195).

82228377809 is a wasteful number, since it uses less digits than its factorization.

82228377809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522194.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 82228377809 in words is "eighty-two billion, two hundred twenty-eight million, three hundred seventy-seven thousand, eight hundred nine".