82578643226 has 8 divisors (see below), whose sum is σ = 124179976020. Its totient is φ = 41185317888.

The previous prime is 82578643219. The next prime is 82578643261. The reversal of 82578643226 is 62234687528.

It is a Cunningham number, because it is equal to 287365²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 82578643225 + 1 = 287365^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52000871 + ... + 52002458.

Almost surely, 2^82578643226 is an apocalyptic number.

82578643226 is a deficient number, since it is larger than the sum of its proper divisors (41601332794).

82578643226 is a wasteful number, since it uses less digits than its factorization.

82578643226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104003728.

The product of its digits is 7741440, while the sum is 53.

The spelling of 82578643226 in words is "eighty-two billion, five hundred seventy-eight million, six hundred forty-three thousand, two hundred twenty-six".