82778001223 has 4 divisors (see below), whose sum is σ = 82798561000. Its totient is φ = 82757441448.

The previous prime is 82778001221. The next prime is 82778001239. The reversal of 82778001223 is 32210087728.

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 82778001223 - 2¹ = 82778001221 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 (82778001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10273848 + ... + 10281901.

It is an arithmetic number, because the mean of its divisors is an integer number (20699640250).

Almost surely, 2^82778001223 is an apocalyptic number.

82778001223 is a deficient number, since it is larger than the sum of its proper divisors (20559777).

82778001223 is a wasteful number, since it uses less digits than its factorization.

82778001223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20559776.

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 82778001223 in words is "eighty-two billion, seven hundred seventy-eight million, one thousand, two hundred twenty-three".