82178774828 has 6 divisors (see below), whose sum is σ = 143812855956. Its totient is φ = 41089387412.

The previous prime is 82178774827. The next prime is 82178774833. The reversal of 82178774828 is 82847787128.

It is a super-2 number, since 2×82178774828² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82178774827) 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 as a sum of consecutive naturals, namely, 10272346850 + ... + 10272346857.

It is an arithmetic number, because the mean of its divisors is an integer number (23968809326).

Almost surely, 2^82178774828 is an apocalyptic number.

It is an amenable number.

82178774828 is a deficient number, since it is larger than the sum of its proper divisors (61634081128).

82178774828 is a wasteful number, since it uses less digits than its factorization.

82178774828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20544693711 (or 20544693709 counting only the distinct ones).

The product of its digits is 22478848, while the sum is 62.

The spelling of 82178774828 in words is "eighty-two billion, one hundred seventy-eight million, seven hundred seventy-four thousand, eight hundred twenty-eight".