82278568079 has 4 divisors (see below), whose sum is σ = 82299513360. Its totient is φ = 82257622800.

The previous prime is 82278568061. The next prime is 82278568093. The reversal of 82278568079 is 97086587228.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82278568079 - 2²⁰ = 82277519503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82278568979) 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, 10466747 + ... + 10474604.

It is an arithmetic number, because the mean of its divisors is an integer number (20574878340).

Almost surely, 2^82278568079 is an apocalyptic number.

82278568079 is a deficient number, since it is larger than the sum of its proper divisors (20945281).

82278568079 is a wasteful number, since it uses less digits than its factorization.

82278568079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20945280.

The product of its (nonzero) digits is 27095040, while the sum is 62.

The spelling of 82278568079 in words is "eighty-two billion, two hundred seventy-eight million, five hundred sixty-eight thousand, seventy-nine".