82578643219 has 2 divisors, whose sum is σ = 82578643220. Its totient is φ = 82578643218.

The previous prime is 82578643187. The next prime is 82578643261. The reversal of 82578643219 is 91234687528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82578643219 - 2⁵ = 82578643187 is a prime.

It is a super-2 number, since 2×82578643219² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 82578643219.

It is not a weakly prime, because it can be changed into another prime (82578643319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41289321609 + 41289321610.

It is an arithmetic number, because the mean of its divisors is an integer number (41289321610).

Almost surely, 2^82578643219 is an apocalyptic number.

82578643219 is a deficient number, since it is larger than the sum of its proper divisors (1).

82578643219 is an equidigital number, since it uses as much as digits as its factorization.

82578643219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The spelling of 82578643219 in words is "eighty-two billion, five hundred seventy-eight million, six hundred forty-three thousand, two hundred nineteen".